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WDM Principle

wwwhuaweicom

Copyright copy 2012 Huawei Technologies Co Ltd All rights reserved



Foreword With the development of telecommunication the

requirements of the transmission capacity and servicecategories are becoming bigger and bigger under this

background WDM technology emerged

Copyright copy 2012 Huawei Technologies Co Ltd All rights reserved Page1



Objectives Upon completion of this course you will be able to

Describe the concepts transmission modes and structure ofWDM

Classify the different types and characteristics of the fiber


Outline the key technologies of WDM system

List the technical specifications for WDM system

Page2



Contents1 WDM Overview

2 Transmission Media

3 Key Technologies


Page3



TDM

STM-16rarr STM-

WDM

Economical amp

Mature amp Quick

How to increase network capacity


Solution of capacity expansion

Add fiber amp

equipment

Time amp cost

64

Cost amp

Complication

Page4



Whats WDM

Gas Station


Free Way

Patrol Car

Page5



WDM Concept Different signals with specific wavelength are multiplexed

into a fiber for transmission


SDH signal

IP package

ATM cells

λ1

λ2

λ1 λ2 λn

λ

λn

Page6



System Structure The overall structure of the WDM system of N-path

wavelength Optical Transponder Unit (OTU)

Optical Multiplexer Unit Optical De-multiplexer Unit


Optical Amplifier (OA)

Supervisory Channel (OSCESC)OTU

OTU

OTU

OM

OA

OA

OD

OTU

OTU

OTU

OSC OSCOSC

OLA

Page7



MUX DMUX

Transmission Modes Single fiber unidirectional transmission


M

4

040

OTU

OTU

Page8



MUXDMUX DMUXMUX

Transmission Modes Single fiber bidirectional transmission


M

4

040

OTU

OTU

Page9



MUX DMUX

Application Modes Open System


M

4

040

OTU

OTU

Client Client

Page10





Advantages of WDM Ultra high capacity

Data transparency transmission

Long haul transmission


High performance-to-cost ratio

High networking flexibility economy and reliability

Smooth expansion

Page12



CWDM Vs DWDM CWDM

Coarse Wavelength Division

Multiplex

DWDM


Dense Wavelength DivisionMultiplex

Extended C band 192chs 25GHz spacing

196075THz 192100THz

C band 160chs

192075THz

Extended32chs

191300THz

ITU-T G6941

Page13



Questions What are WDM DWDM and CWDM

Difference between the two transmission modes


Difference between the two application modes

List the structure of the WDM system

Page14



Summary Basic concepts and features of WDM DWDM and CWDM

WDM system structure

Transmission and application Modes of WDM system






Structure of Optical Fiber Consists of a cylindrical glass core a glass cladding and a

plastic wear-resisting coating

Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18



Dispersion Chromatic dispersion

Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient

Chromatic DispersionG652widely used needdispersion compensationfor high rate transmission

G653 Zero dispersionat 1550nm window


G655

1550nm1310nm

17psnmkm

brvbar Euml

G655 Little dispersionto avoid FWM

Page20



Chromatic Dispersion Compensation The pulse will be broadened because of

Positive dispersion coefficient at 1550nm window

DCF has negative dispersion coefficient and can counteract

positive dispersion in transmission


DispersionCoefficient G652

Normal DCF

DSCF Dispersion SlopeCompensation Fiber

wavelength

Page21



Polarization Mode Dispersion Polarization mode dispersion

FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22



Questions Whatrsquos difference between the refractive index of the

cladding and core

What are the features of G652 G653 and G655 fibers


How to compensate the chromatic dispersion

Page23



Summary Structure of optical fiber

Types of optical fiber

Characteristics of optical fiber






3 Key Technologies


Page25



Optical Source Optical Multiplexer

and Demultiplexer

WDM System Key Technologies


Optical Amplifier Supervisory

Technologies

Key Tech in WDM

Page26



1 Larger dispersion tolerance value

Requirements of Optical Source


2 Standard and stable wavelength

Page27



Direct Modulator

LD


Modulation current

Page28



Electro-Absorption (EA) External

Modulator

LD EADCcurrent drive ITU brvbar Euml


Modulation current

Page29



Mach-Zehnder (M-Z) External Modulator

Modulation current

LD


DC currentdrive

Page30



Coherent Modulator and Receiver Coherent modulator

Step 1 The polarization beam splitter splits the laser light into

two polarizations (X-pol and Y-pol) that are perpendicular to

each other


SplitPolarization signal

on the X-pol

b Traverse the polarizationbeam splitter

a Laser signal (electromagnetic wave)


on the X-polOptical signal

Transmissiondirection

Photon polarizations

c Signals on the X-pol andY-pol after being split

Page31




Step 2 The polarization beam combiner combines the

modulated signal on the X-pol and that on the Y-pol onto the

same fiber


QPSK-modulatedsignal on the X-pol

QPSK-modulated signalon the Y-pol

Page32



Coherent Modulator and Receiver QPSK modulation technology

Signal Input

I QSignal Output Phase

θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2

Optical signal onthe X-pol

Sinωt

Cosωt

I

Q

+

-

s(t)

= I x Cosωt ndash Q x Sinωt = radic2 Cos (ωt + θ)

28 Gbauds

Data


I

Q

0001

11 10

Schematic representation of the mapping

relationship (constellation diagram)

A constellation diagram shows thedistribution of signal vectors Because a

constellation diagram can fully and clearly

depict the signal mapping relationship fordigital modulation digital modulation is also

called constellation modulation

Codestream

I

Q

QPSK

θ



Coherent Modulator and Receiver Coherent receiver

Step 3 At the receive end the received signal light is divided

into two One is allocated to the x-pol and the other to the y-

pol


Splitpolarization signalon the x-pol

Splitpolarization signal

on the y-pol

Page34



Comparison of Modulators

Types Direct Modulator EA Modulator M-Z Modulator

Coherent

Modulator

Max dispersion

toleration snm1200~4000 7200~12800 gt12800 40000


Cost moderate expensive very expensive very expensive

Wavelength

Stabilitygood better best best

Page35



Optical Amplifiers

EDFA

Erbium Doped Fiber Amplifier


RFA Raman Fiber Amplifier

OA

Page36



Stimulated radiationStimulated radiation


E2 meta-stable state

E3 excited state

1550nmsignal light

DecaDecayy


Er3+

energy level diagram

E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38





Automatic Gain Control

Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter

EDFInput Power Pin Output Power Pout

Gain = Pout Pin is invariable

coupler

Page40



Raman Fiber Amplifier Stimulated Raman Scattering

PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman

Flexible gain wavelength

Simple structure

hellip

High pump power low

efficiency and high cost

Components amp fiber

hellipAdvantages Disadvantages


Low noiseundertake the high power

Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA


Booster amplifier Line Amplifier Pre-amplifier

Page43



Optical Multiplexer and Demultiplexer

TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn

AWG Arrayed Waveguide Grating

Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45



Arrayed Waveguide Grating

Arrayed of waveguides 1hellipn


λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46



OSC Optical Supervisory Channel Technology

Supervisory Technologies


ESC Electrical Supervisory ChannelTechnology

Page47





Typical frame structure of OSC

TS0 TS1 TS2 TS3 helliphellip TS1

4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte

TS1 E1 byte TS18 F3 byte

TS2 F1 byte TS19 E2 byte

TS14 ALC byte Others Reserved

TS3-TS13 TS15 D1-D12 bytes

Page49



Electrical Supervisory Channel

Features

Simple structure amp cost saving

Redundancy supported

Improve power budget

Reduce s stem com lexit


M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions

What is the mechanism of electro-absorption modulation

How many types of multiplexer are there used for WDM


What is the difference between EDFA and Raman

What are the working wavelength and bit rate of OSC signal

Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53



Related ITU-T recommendations

G652 Characteristics of a single-mode optical fiber cable

G655 Characteristics of a dispersion-shifted SMF

G661G662G663 Relevant recommendations of OA G671 Characteristics of passive optical components

G957 Optical interfaces relating to SDH system


G691 Optical interfaces for single channel STM-64 STM-256 systems

and other SDH systems with OA

G692 Optical interfaces for multi-channel systems with OA

G709 Interfaces for the optical transport network (OTN)

G975 Forward error correction for submarine systems (FEC)

Page54

Transmission Channel Reference




Points




Distribution of Optical Wavelength Areas

Nominal central frequency refers to the central wavelength

corresponding to each channel in WDM systems Channel

frequency allowed in G692 is based on frequency and spacing

series of reference frequency 1931THz and minimum spacing

100GHz 50GHz or 25GHz


Q i



Questions

Which are the ITU-T recommendations involved for WDM

part

What is the absolute reference frequency for WDM systems




Thank you



Foreword With the development of telecommunication the

requirements of the transmission capacity and servicecategories are becoming bigger and bigger under this

background WDM technology emerged










Page2





3 Key Technologies


Page3



TDM

STM-16rarr STM-

WDM

Economical amp

Mature amp Quick




Add fiber amp

equipment

Time amp cost

64

Cost amp

Complication

Page4



Whats WDM

Gas Station


Free Way

Patrol Car

Page5






SDH signal

IP package

ATM cells

λ1

λ2

λ1 λ2 λn

λ

λn

Page6









OTU

OTU

OM

OA

OA

OD

OTU

OTU

OTU

OSC OSCOSC

OLA

Page7



MUX DMUX



M

4

040

OTU

OTU

Page8



MUXDMUX DMUXMUX



M

4

040

OTU

OTU

Page9



MUX DMUX



M

4

040

OTU

OTU

Client Client

Page10











Smooth expansion

Page12



CWDM Vs DWDM CWDM


Multiplex

DWDM




196075THz 192100THz

C band 160chs

192075THz

Extended32chs

191300THz

ITU-T G6941

Page13








Page14













Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you









Page2





3 Key Technologies


Page3



TDM

STM-16rarr STM-

WDM

Economical amp

Mature amp Quick




Add fiber amp

equipment

Time amp cost

64

Cost amp

Complication

Page4



Whats WDM

Gas Station


Free Way

Patrol Car

Page5






SDH signal

IP package

ATM cells

λ1

λ2

λ1 λ2 λn

λ

λn

Page6









OTU

OTU

OM

OA

OA

OD

OTU

OTU

OTU

OSC OSCOSC

OLA

Page7



MUX DMUX



M

4

040

OTU

OTU

Page8



MUXDMUX DMUXMUX



M

4

040

OTU

OTU

Page9



MUX DMUX



M

4

040

OTU

OTU

Client Client

Page10











Smooth expansion

Page12



CWDM Vs DWDM CWDM


Multiplex

DWDM




196075THz 192100THz

C band 160chs

192075THz

Extended32chs

191300THz

ITU-T G6941

Page13








Page14













Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you





3 Key Technologies


Page3



TDM

STM-16rarr STM-

WDM

Economical amp

Mature amp Quick




Add fiber amp

equipment

Time amp cost

64

Cost amp

Complication

Page4



Whats WDM

Gas Station


Free Way

Patrol Car

Page5






SDH signal

IP package

ATM cells

λ1

λ2

λ1 λ2 λn

λ

λn

Page6









OTU

OTU

OM

OA

OA

OD

OTU

OTU

OTU

OSC OSCOSC

OLA

Page7



MUX DMUX



M

4

040

OTU

OTU

Page8



MUXDMUX DMUXMUX



M

4

040

OTU

OTU

Page9



MUX DMUX



M

4

040

OTU

OTU

Client Client

Page10











Smooth expansion

Page12



CWDM Vs DWDM CWDM


Multiplex

DWDM




196075THz 192100THz

C band 160chs

192075THz

Extended32chs

191300THz

ITU-T G6941

Page13








Page14













Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



TDM

STM-16rarr STM-

WDM

Economical amp

Mature amp Quick




Add fiber amp

equipment

Time amp cost

64

Cost amp

Complication

Page4



Whats WDM

Gas Station


Free Way

Patrol Car

Page5






SDH signal

IP package

ATM cells

λ1

λ2

λ1 λ2 λn

λ

λn

Page6









OTU

OTU

OM

OA

OA

OD

OTU

OTU

OTU

OSC OSCOSC

OLA

Page7



MUX DMUX



M

4

040

OTU

OTU

Page8



MUXDMUX DMUXMUX



M

4

040

OTU

OTU

Page9



MUX DMUX



M

4

040

OTU

OTU

Client Client

Page10











Smooth expansion

Page12



CWDM Vs DWDM CWDM


Multiplex

DWDM




196075THz 192100THz

C band 160chs

192075THz

Extended32chs

191300THz

ITU-T G6941

Page13








Page14













Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



Whats WDM

Gas Station


Free Way

Patrol Car

Page5






SDH signal

IP package

ATM cells

λ1

λ2

λ1 λ2 λn

λ

λn

Page6









OTU

OTU

OM

OA

OA

OD

OTU

OTU

OTU

OSC OSCOSC

OLA

Page7



MUX DMUX



M

4

040

OTU

OTU

Page8



MUXDMUX DMUXMUX



M

4

040

OTU

OTU

Page9



MUX DMUX



M

4

040

OTU

OTU

Client Client

Page10











Smooth expansion

Page12



CWDM Vs DWDM CWDM


Multiplex

DWDM




196075THz 192100THz

C band 160chs

192075THz

Extended32chs

191300THz

ITU-T G6941

Page13








Page14













Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you






SDH signal

IP package

ATM cells

λ1

λ2

λ1 λ2 λn

λ

λn

Page6









OTU

OTU

OM

OA

OA

OD

OTU

OTU

OTU

OSC OSCOSC

OLA

Page7



MUX DMUX



M

4

040

OTU

OTU

Page8



MUXDMUX DMUXMUX



M

4

040

OTU

OTU

Page9



MUX DMUX



M

4

040

OTU

OTU

Client Client

Page10











Smooth expansion

Page12



CWDM Vs DWDM CWDM


Multiplex

DWDM




196075THz 192100THz

C band 160chs

192075THz

Extended32chs

191300THz

ITU-T G6941

Page13








Page14













Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you









OTU

OTU

OM

OA

OA

OD

OTU

OTU

OTU

OSC OSCOSC

OLA

Page7



MUX DMUX



M

4

040

OTU

OTU

Page8



MUXDMUX DMUXMUX



M

4

040

OTU

OTU

Page9



MUX DMUX



M

4

040

OTU

OTU

Client Client

Page10











Smooth expansion

Page12



CWDM Vs DWDM CWDM


Multiplex

DWDM




196075THz 192100THz

C band 160chs

192075THz

Extended32chs

191300THz

ITU-T G6941

Page13








Page14













Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



MUX DMUX



M

4

040

OTU

OTU

Page8



MUXDMUX DMUXMUX



M

4

040

OTU

OTU

Page9



MUX DMUX



M

4

040

OTU

OTU

Client Client

Page10











Smooth expansion

Page12



CWDM Vs DWDM CWDM


Multiplex

DWDM




196075THz 192100THz

C band 160chs

192075THz

Extended32chs

191300THz

ITU-T G6941

Page13








Page14













Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



MUXDMUX DMUXMUX



M

4

040

OTU

OTU

Page9



MUX DMUX



M

4

040

OTU

OTU

Client Client

Page10











Smooth expansion

Page12



CWDM Vs DWDM CWDM


Multiplex

DWDM




196075THz 192100THz

C band 160chs

192075THz

Extended32chs

191300THz

ITU-T G6941

Page13








Page14













Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



MUX DMUX



M

4

040

OTU

OTU

Client Client

Page10











Smooth expansion

Page12



CWDM Vs DWDM CWDM


Multiplex

DWDM




196075THz 192100THz

C band 160chs

192075THz

Extended32chs

191300THz

ITU-T G6941

Page13








Page14













Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you











Smooth expansion

Page12



CWDM Vs DWDM CWDM


Multiplex

DWDM




196075THz 192100THz

C band 160chs

192075THz

Extended32chs

191300THz

ITU-T G6941

Page13








Page14













Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



CWDM Vs DWDM CWDM


Multiplex

DWDM




196075THz 192100THz

C band 160chs

192075THz

Extended32chs

191300THz

ITU-T G6941

Page13








Page14













Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you








Page14













Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you













Refraction


θ

2

n1Reflection Core

Coating

Page17



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



AttenuationdBkm

4

5

M u

l t i -m o d e

Oband

E S C L U


900 1300 1400 1500 1600 1700

nm

2

1

1200

（ 8 5 0 ~ 9 0 0 n

m ）

OH-

Page18




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you




Power

Optical pulses


Time

TransmittingL1 (km)

TransmittingL2 (km)

Page19



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



Dispersion

coefficient




G655

1550nm1310nm

17psnmkm

brvbar Euml


Page20









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you









Normal DCF


wavelength

Page21




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you




FastFast


The Profileof fiber

ellipsecore

Slow

Time Delay

The Profileof fiber

ellipsecore

Slow

Time Delay

Page22




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you




cladding and core




Page23











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you











3 Key Technologies


Page25




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you




and Demultiplexer




Technologies

Key Tech in WDM

Page26







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you







Page27



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



Direct Modulator

LD


Modulation current

Page28




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you




Modulator



Modulation current

Page29




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you




Modulation current

LD


DC currentdrive

Page30






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you






each other



on the X-pol








Page31






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you






same fiber




Page32




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you




Signal Input


θ

0 00 1

1 1

1 0

π 4

3π 4

5π 4

7π 4

Pre-

coder

Pre-

coder

28 Gbauds

Data

Σ

π 2


Sinωt

Cosωt

I

Q

+

-

s(t)


28 Gbauds

Data


I

Q

0001

11 10







Codestream

I

Q

QPSK

θ






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you






pol




on the y-pol

Page34





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you





Coherent

Modulator

Max dispersion




Wavelength


Page35



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



Optical Amplifiers

EDFA




OA

Page36






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you






E3 excited state

1550nmsignal light

DecaDecayy


Er3+


E1 ground state

1550nmsignal light

980nmpump light

Page37



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



Structure of EDFA

Coupler

EDF

ISO

Pumping laser

ISO

TAP

Signal input

TAP

Signal Output


PD PD

ISO Isolator

PD Photon Detector

Page38






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you






Pin Pout

Gainλ1~ λn

λ1~ λn

EDFA


Gain no change

PINpump

PINDSP

splitter splitter



coupler

Page40




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you




PumpGain


nm

13THz

Pump3

70~100nm

30nm

GainPump2Pump1

Page41



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



Features of Raman


Simple structure

hellip

High pump power low






Page42



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



Application of OA

M40

OTU

OTU

M40

M4

0

OTU

OTU

M40

MU

X

DMUX

OA OA OA



Page43




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you




TFF

Thin Film Filter


Multiplexer

λ1

λ2

λn

λ1λ2 λn

Demultiplexer

λ1

λ2

λn

λ1 λ2 λn


Page44



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



λ1- λ4

Self-focusing lens

λ1

filter

Thin Film Filter


λ4

λ2

λ3

λ3 filter

Glass

λ1

Page45






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you






λ983089983084λ983090991270 λ983150

λ983089

λ983150

Arrayed of fibers

Page46







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you







Page47







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you







4

TS1

5

TS1

6

helliphellip TS31


TS0 FA TS17 F2 byte





Page49




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you




Features






M 4

0

M

40

OTU1

OTU2OTU3

OTU4

OTU1

OTU2OTU3

OTU4

S

CC

S

CC

Page50



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



Questions






Page51



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



Summary

Optical source

Optical amplifier

Optical multiplexer




Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you



Contents

1 WDM Overview


3 Key Technologies


Page53














Page54





Points











Q i



Questions


part





Thank you














Page54





Points











Q i



Questions


part





Thank you




Points











Q i



Questions


part





Thank you










Q i



Questions


part





Thank you



Questions


part





Thank you



Thank you

1. otc000003 wdm principle issue1

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