olaf ziemann, juri vinogradov pof application center nürnberg

POF Standards 2010POF Standards 2010what do we need next ?what do we need next ?

Olaf Ziemann, Juri Vinogradov POF Application Center NürnbergPOF Standards Workshop: Discussion and

Strategy on the Development of POF Standards- March 23, 2009

2:00 p.m. - 5:00 p.m.

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Olaf ZiemannPOF-AC Nürnbergwww.pofac.de

Content

Application of POFConsequencesnext steps for standardizationthe optical interface - mainly required for Gigabit transmissionSimulation

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ApplicationsApplications

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Application areas of POF

Use of standard SI-POF:AutomationAutomation: change from field bus applications to Fast EthernetCar networksCar networks: higher speed required (from 25 Mbit/s - 150 Mbit/s - 1000 Mbit/s ?); passive star networks for Flexray ?Home networksHome networks: Gigabit Ethernet required, optical interface standardInterconnectionInterconnection: multi channel parallel transmission, speeds up to 10 Gbit/s, low power consumption

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Home networking market

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

1995 2000 2005 2010 2015 2020 2025Source: Technology Futures Inc.

1.5 Mbit/s

6 Mbit/s

24 Mbit/s

100 Mbit/sand more

all households

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bandwidth expectations

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Consequences

Home network requirements:1 1 GbitGbit/s will be required in the next years/s will be required in the next yearssimple installation techniques for home simple installation techniques for home networksnetworksprofessional installation techniques for professional installation techniques for building (backbone) networksbuilding (backbone) networksfirst step: definition of cables, fibers and first step: definition of cables, fibers and connectors requiredconnectors requiredsecond step: definition of an optical POF second step: definition of an optical POF interface requiredinterface required

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Next steps of Next steps of POF standard POF standard

activitiesactivities

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New VDE/VDI working group

First meeting in Jan. 2009:4 main Topics identified

Fibers and cablesFibers and cablesConnectors for POF home/apartment Connectors for POF home/apartment networks and other applicationnetworks and other applicationMeasurement technologies and devicesMeasurement technologies and devicesstandardized optical POF interfacesstandardized optical POF interfaces

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Example I: connectors

present available connectors:

EM-RJ SC-RJ SMI

The IEC view:

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Installation without connectors !!

Siemens

Ratioplast

Firecomms

DieMount

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possible directions

use of connector less installation in the use of connector less installation in the apartment by the customer (fiber spec is apartment by the customer (fiber spec is the connector spec)the connector spec)use of standard connector in (structured) use of standard connector in (structured) building networksbuilding networksdifferent connectors for GOF and POF ! different connectors for GOF and POF ! --make is impossible to connect the wrong make is impossible to connect the wrong cable; profit from the more relaxed cable; profit from the more relaxed tolerances; create an individual POF tolerances; create an individual POF image (image (see RJ45 is Ethernetsee RJ45 is Ethernet))

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The POF-SFP idea

installation “Link on demand”free choice of transmission medium100/1000 Mbit/s upgrade possibleconnector less or standard connectors

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Example II: Fibers

Decision in 2008: A4a.2

but what about A4b .. A4h ?GI-POF: what diameter, NA ?MC-POF: how many single cores, NA, diameter, loss ?PF-GI-POF: 50 µm, 62½ µm, 80 µm, 120 µm, 200 µm ? present bandwidth specification is 1880 - 5000 MHz · 100mPF-GI-POF: Mode mixing is important for the bandwidth: spec of coupling length ?t.b.c.

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Example III: Cable

Simplex or Duplex1.5 or 2.2 mm jacket

Standard Simplex-POF

Standard Duplex-POF

Siemens Duplex-POF

2,2 mm 4,4 mm 3,0 mm

Identification of POF type:- by color, colored dots or rings- by printed code- by different jacket diameter

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Example IV: measurement

we have a standard for attenuation measurements on the A4a.2 fiber

we are still missing:standard for fiber bandwidthstandard for connector loss (e.g. OTDR)loss measurements on A4d, A4emode mixers for A4d, A4e and PCSspecification of optical properties for modulated signals (e.g. eye diagram mask with standard equalizer)…

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SI-POF bandwidth

1 10 100

100

1000

L1~

L1~

Input NA=0.02Input NA=0.1Input NA=0.17Input NA=0.32Input NA=0.46Input NA=0.65 Distance [m]

Bandwidth [MHz]

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the optical interface the optical interface -- mainly required mainly required

for Gigabit for Gigabit transmissiontransmission

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1 Gbit/s over 100 m POF ?

Typical SI-POF bandwidth is 40 MHzbut: Bandwidth of a Cat 6 cable is 3 MHz1 Gbit/s over 100 m POF have been realized with:

passive equalizing (POF-AC)OFDM (Siemens)DFE/FFE filter (TU Munich/Siemens)

there is still place for improvements (e.g.integrated receivers)

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How fast is a 1 mm POF over 100 m

0

200

400

600

800

1000

1200

1400

1600

1800

2000

05 06 07 0890 91 92 93 94

bit rate [Mbit/s]

year

100 m standard POF (A4a.2), NA = 0.50

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last result (TU Munich)

- Laser : Union Optronics - sequence : PRBS7, 2000 Mbit/s- fractionally-spaced DFE offline processed (Matlab)- offline measured BER: 2 · 10-5

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Simulation of Simulation of optical Systemsoptical Systems

-- basis of standardsbasis of standards

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next activities

POF-SC: the POF Simulation Centerstarted in Jan. 2009 in Nürnberginternational speaker: Prof. Bunge (Telekom University Leipzig)Goal: coordination of all European POF simulation activitiescreate basic data for standardsrunning project: physical model for connector lossesready: simulation of Gbps links with NRZ, DMT and FFE/DFEsee Juri’s presentation at the POF-Day

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Example POF connector loss

θmax1 θmax2

connector loss in theory:Solid angle for input fiber: θmax1

2⋅πSolid angle for output fiber: θmax2

2⋅πAttenuation: α = 10 ⋅ log (Ω1/Ω2)

= 10 ⋅ log (θmax12/θmax2

2)Expressed by NA: α = 10 ⋅ log (AN1

2/AN22)

but: how is the loss under EMD conditions ?approach: statistical model for light distribution

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Example: 1.39 Gbit/s NRZ

Measured and simulated eye diagram

Time [ns] 0.2 0.6 1.0 1.4 1.8

Time [ns] 0.2 0.6 1.0 1.4 1.8

650 nm Laser diode, +6.5 dBm fiber coupledreceived power: -11 dBm after 100 m POFBER ≈ 10-9

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the eye problem

at the PD, the eye is completely closed,how can I specify the optical input signal ?one option: reference equalizer

1.25 Gbit/s50 m POFno equalizer

1.25 Gbit/s50 m POFoptimized equalizer

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ConclusionConclusionoutlookoutlook

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combination radio and POF

building network e.g.: 60 m /470 nm, Duplex fiber

optical switch apartment network

e.g.: 25 m at 650 nm, Simplex fiber

DVB-X

broadband access: ADSL2+, VDSL, HFC, WiMax, FTTB..

broadband radio cell

active node

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the vision of the POF future

distance

1 mm1 cm

10 m

10 km

10,000 km

1 m

1 km

1,000 km

10 cm

100 m

100 km

trans oceanic trans continental metro networks access networks building networksapartment, cars intra device on board links intra chip links

1970 1980 1990 2000 2010 2020

copper

single mode fiber

year

POF

olaf ziemann, juri vinogradov pof application center nürnberg

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