combining component characterization and simulation to...

Combining Component Characterization and Simulation to Enable the Next Generation

Optical Network

A Luna Technologies Webinar Cosponsored by RSoft Design Group

Luna Technologies:Dr. Brian Soller - DirectorEd Valigursky - VP Sales

RSoftDr. Gary Shaulov - Senior ScientistJigesh K. Patel - Senior Applications

Engineer

Agenda

• Marketplace Overview• Issues, Means, Impact• Optical Vector Analysis Live Demo• Network Simulation Example With

Optsim• RSoft Overview• Luna Technologies Overview• Questions and Wrap-Up

Marketplace Overview

• Margins have eroded• Things are turning up• Cost cutting techniques and efficiencies are

the keys to success• Techniques need to be quickly and easily

ported into R&D and manufacturing• Challenges

– New specifications (GD, CD, PMD, SOPMD)– Customers are pushing back test on suppliers– Sampling lengthens the sales cycle– More complicated designs and tunable devices

• Long list of required measurements– IL, RL, PDL, CD, GD, PMD, SOPMD, etc.

• Extremely tight parametric specifications– IL/PDL 0.01 dB accuracy with 60 dB D.R.– GD/PMD 50 fs accuracy with 40 dB D.R.

• Narrow λ resolution and accuracy– Resolution < 1pm, accuracy ~ 1pm

• High channel count with multiple in/out ports (100 +)

• Multiple operational states per channel (add/drop, dynamic gain, etc.)

Component Test: Issues

-80

-60

-40-20

0

IL (d

B)

15701565156015551550

wavelength (nm)

Component Test: Means

• Light source (laser, broad band)

• Polarization controller• Modulator (for dispersion)

• Detectors/Power meters• Optical spectrum analyzer

• Multiple instruments/connects & disconnects• Long test times due to multiple

techniques

Component Test: Impact

• Increased man hours– Elongated test times on multiple, slow test-sets– Increased fiber and component handling– Multiple people required to manage test stations

• Increased investment dollars– Multiple, expensive stations required– Maintenance and upkeep is expensive– Time of test translates to cost

• Customer returns and bad yields

The Luna Solution:

• Industry’s first all parameter analyzer for fiber components and modules

• Industry’s only completely integrated solution for Loss, Dispersion, PDL, PMD, etc.

• More comprehensive testing and inspection in less time

The Optical Vector Analyzer

Optical Vector Analysis

( ) ( ) ( )( ) ( )H

A B

C D

ω ωω

ω ω

=

DUT is completely characterized by four independent complex functions. From H(ω), calculate IL, PDL, GD, CD, PMD, etc.

The Result

• Greatly increased speed of test• Complete measurement integration• Ultimate accuracy and resolution• Ease of use

Dramatic design and manufacturing cost reduction…

Measurement Example: Tunable Filter

Laser Interferometry

• Laser is frequency tuned

• Four elements of transfer function are

measured simultaneously for every λ

DUT

PBS

∆τADC

∆τp

TLS

OVAe Product Highlights

• All Parameter Analysis - Obtain all parameters in a single scan

• Exclusive Linear Transfer Function Measurement – See true component performance in terms of EOP and BER

• Industry Leading Speed - Fully specified measurements for all parameters over C-band in 15 seconds

• Industry leading Accuracy – No compromising accuracy for speed

• World Class Support Team

Outcome

• Time– Saves time in all stages of the test cycle – Increases overall efficiency– Time of test down by 85%– Design cycles reduced by 60%

• Money– Saves Hard Dollars in yield loss– Saves in cap-ex– Saves in labor– Cost-of-test from 18% to <4% of COGS– Customer returns from 30% down to <1%– Creates testing differentiator for the product

Introduction to OptSim

�Motivation using simulation tools

�Reduced costs and time to market

� Flexibility of estimating device performance under a

variety of design objectives

� Unique features of OptSim

� Virtual laboratory with over 600 available components

and fibers

� Fast learning curve, intuitive user interface

� Twin Simulation Engines: Block-Mode and Sample-Mode

� User-friendly MATLAB® interface with full co-simulation

feature

� Interfaces with laboratory test equipment: Luna

Technologies Optical Vector Analyzer (OVA) and others

� DWDM/CWDM amplified systems

� Back-haul, metro core, and access optical networks

� P2P, P2M, M2M, mesh, and ring network architectures

� Ultra long-haul terrestrial and submarine systems

� FTTx/PON systems

� OTDM/OCDMA systems

� CATV Digital/Analog systems

� Optical LANs – 1 and 10 Gigabit Ethernet

� Optical interconnects

� Soliton systems

� Free-space optics (FSO) systems

OptSimTM: Typical Applications

Luna OVA to OptSim Interface

� Jones Matrix vs. wavelength – Linear Transfer Function• Completely characterizes the device, from which Insertion Loss,

Return Loss, Polarization Dependent Loss, Group Delay, Differential Group Delay, Chromatic Dispersion, Polarization Mode Dispersion (PMD), wavelength response can be extracted

� OptSim accepts the LTF file data to completely characterize the device in system simulations• Evaluate system performance of measured component• Compare simulations using different measured components to

determine effect of component variations on system performance

• Optimize system design for actual component characteristics

=

)(

)(

)()(

)()(

)(

)(

,

,

2221

1211

,

,

ωω

ωωωω

ωω

iny

inx

outy

outx

E

E

JJ

JJ

E

E

Dispersion Compensating Grating

Measured Data

Linear Transfer Function Analysis

OptSim model reads Luna OVA measurement data and loads it to use for system simulation

Simulation Example 1: FBG (-vedispersion)

�Device under Test – Fiber Bragg Grating with negative dispersion slope and total dispersion about –800 ps/nm

Dispersion Compensation Example

� Transmitter: 10 Gbps NRZ

externally modulated,

1588.2nm

� Output from transmitter

goes to device under test

– FBG

� Output from FBG goes to

45 km of SMF-28 fiber

with 17 ps/nm/km

dispersion at 1550nm

� FBG acts as dispersion

pre-compensation

Simulation Example 2: FBG (+ dispersion)

FBG with positive dispersion -

post-compensation example

Conclusion

�Ensuring QoS requires design validations using advanced simulation technologies, like OptSim, at the physical layer

�Accurate device modeling requires high-resolution measurement of performance parameters, like those obtained from Luna Optical Vector Analyzer (OVA)

�Interface between Luna OVA and OptSimoptical communication system simulation software provides added value to both component test & measurement, and network modeling, simulation, and design.

About RSoft

� Leader in Photonic Design and Simulation Software

� Founded in 1991

� Headquarters: Ossining, NY

� US Locations: Chicago, IL and Milpitas, CA

� International Locations: U.K. and Japan

� International Distributors:

- Italy - France - Australia

- China - Taiwan - Korea

- Singapore - India - Israel

� Industrial Consortium/Collaboration:

- PCAD: photonic devices and systems

- DataPipe: low cost high-performance optical data-links

- Advanced Laser Manufacturing: Design automation for lasers

- Navy SBIR for Fiber Optic Simulation: Systems for 10Gb Ethernet

BeamPROPFullWAVEBandSOLVE GratingMOD DiffractMODLaserMODFemSIMMOST

BroadbandSWATWirelessSWAT

Artifex

MetroWAND

OptSim ModeSYS

EDFA for Vendors

RSoft Design Group Product Family

Component SuppliersResearch Institutions

Component SuppliersEquipment Vendors

Service ProvidersConsultants Investors

CarriersSystems Integrators Equipment Vendors

Contact Information

RSoft Design Group400 Executive Boulevard, Suite 100

Ossining, NY 10562

Phone: (914) 923-2164Fax: (914) 923-2169

E-mail: info@rsoftdesign.com

http://www.rsoftdesign.com

About Luna

• Luna Innovations commercializes technology in advanced materials, life sciences, sensing and industrial instrumentation

• Founded 1992 with six VA locations

• Luna Technologies, a division of Luna Innovations: Focused on measurement instrumentation for fiber-optic components and subsystems

• World headquarters in Blacksburg, VA

• World-wide sales offices and representation

Contact:(540) 961-5190Sales: (770) 634-6765solutions@lunatechnologies.com

Need More Information?