Olaf Ziemann, Juri Vinogradov POF Application Center Nürnberg
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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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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%
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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
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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
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