10GBASE-LRM over 300m of FDDI-grade Fiber

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1 GBASE-LRM over m of FDDI-grade Fiber Experimental & Simulation Results Jonathan King Sudeep Bhoja Ottawa Sept. 4 Big Bear Networks, Inc.

2 Outline System Simulations Description of Model Results (CL & OSL) System Experiments on TIA 2-96 Round Robin Fiber Set Test set-up PIE Metrics Lab BER Results (CL & OSL) Discussion & Next Steps Big Bear Networks, Inc. 2

3 Simulation Model Cambridge v. 8 fiber mode delays Cambridge 2. Mode Power Distribution MPD for OSL at um steps 8 mode-groups were used in calculations PIE-L & PIE-D 4.ps rise-time Gaussian Tx filter.5ghz, 4 th -order Bessel-Thompson Rx filter Big Bear Networks, Inc.

4 Simulation 8 Fiber Delay Set PIE Metrics DFE required to meet m distance requirements Center Launch 82.z OSL (2 +/- um) LE unlikely to meet m distance requirements Connectors are not included likely to degrade performance Big Bear Networks, Inc. 4

5 Experimental Comparison to TIA Round Robins FO2-2 2/96 BW Modal Launch Test Cable Originally used for Gigabit Ethernet round robin testing E.g. 2orange, 4orange, 5 fibers - nine 62.5um & six 5um fibers Nine 62.5um fiber results presented here All fibers m in length Recently used in measurement validation of the simulation model for Cambridge 8 fibre set (see cam 54) 4 fibres worse than 5MHz km Selection of causal, anti-causal and 'symmetric' impulse responses for OSL Big Bear Networks, Inc. 5

6 Big Bear Networks, Inc. 6 Source: Cambridge (cam 54)

7 TIA 2-96 Fiber Set With OSL: 62.5um -Green -Orange -Blue Time (ps) Time (ps) Time (ps) nm nm nm DMD (ps/m) Position (um ) DMD (ps/m) Position (um) DMD (ps/m) Position (um) Big Bear Networks, Inc.

8 TIA 2-96 Fiber Set With OSL: 62.5um 2-Green 2-Orange 2-Blue Time (ps) Time (ps) Time (ps) nm nm nm DMD (ps/m) Position (um) DMD (ps/m) Position (um) DMD (ps/m) Position (um) Big Bear Networks, Inc. 8

9 TIA 2-96 Fiber Set With OSL: 62.5um -Blue -Aqua -Violet Time (ps) nm Time (ps) nm Time (ps) nm DMD (ps/m) Position (um) DMD (ps/m) Position (um ) DMD (ps/m) Position (um) Big Bear Networks, Inc. 9

10 PIE Metrics: Test Set-up and Procedure Impulse response measured using gain switched DFB CL, OSL (62.5um for all) launches, best and worst polarization / fibre configuration (labeled b & w ) Integrate impulse to get step response Delay step by 9.ps, invert & subtract from original to yield isolated '' bit response FFT, normalize DC component, and fold spectrum around 5.GHz Piece-wise integration from to 5.GHz, following equations for PIE-L & PIE D (Bhoja 4) Pulse source Gb TOSA CL or 2um OSL TIA 2/96 set (m) 8GHz MM Rx DCA 5m patchcord Big Bear Networks, Inc.

11 Summary Table: PIE-L & -D Metrics for 2-96 Set Fibre orange 2 green blu 4 2orange 5 2green 6 2blu 2aqua 8 blu 9 violet OFL Bw MHz.km CL Bw, MHz.km CL b, PIE-L CL w, PIE-L CL b, PIE-D CL w, PIE-D OSL b, PIE-L OSL w, PIE-L OSL b, PIE-D OSL w, PIE-D Big Bear Networks, Inc.

12 2-96 Set PIE Metrics for CL db PIE-D /OFL b w b w b w b w b w b w b w b w b w /GHz db PIE-L /OFL b w b w b w b w b w b w b w b w b w /GHz cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl f, orng f2, grn f, blu f4, 2orng f5, 2green f6, 2blue f, aqua f8, blue f9, violet f, orng f2, grn f, blu f4, f5, 2orng 2green f6, 2blue f, aqua f8, blue f9, violet All fibres below 4.5dB PIE-D for best and worst case IPR 5/9 fibres below 4.5dB PIE-L for best and worst case IPR & all fibres below 5.6dB Note: Connector off-sets are not included likely to degrade performance Big Bear Networks, Inc. 2

13 2-96 Set PIE Metrics for 2um OSL db PIE-D /OFL m w b m b w b w b w b w b w b w /GHz db PIE-L /OFL m w b m b w b w b w b w b w b w /GHz 2um osl um- um- um- um- um- um- um- um- um- um- um- um- um- um- um- 2um osl um- um- um- um- um- um- um- um- um- um- um- um- um- um- um- f, f2, orng grn f, blu f4, 2orng f5, 2green f6, 2blue f, aqua f8, blue f9, violet f, f2, orng grn f, blu f4, 2orng f5, 2green f6, 2blue f, aqua f8, blue f9, violet 4/5 compliant fibres (OFL Bw>5MHz) below 4.5dB PIE-D for best and worst case IPR All compliant fibres <5dB /5 compliant fibres (OFL Bw>5MHz) below 4.5dB PIE-L for best and worst case IPR All compliant fibres <8.5dB Big Bear Networks, Inc.

14 .Gb/s System Test Bed Gb TOSA CL or 2um OSL Atten Gb ROSA Laser Driver TIA 2/96 set (m) LA/ CDR Anritsu Gb/s Pattern Gen Anritsu Gb/s Error Det DFE EDC FFE Big Bear Networks, Inc. 4

15 TIA 2-96 m MMF Round Robin: CL Results BER Orange -Green -Blue 2-Orange 2-Green 2-Blue -Aqua -Blue -Violet SMCL_B2B Measurements made with discrete FFE and DFE IC s Limited dynamic capability for these tests Connector off-sets not included, likely to degrade final performance OMA (dbm) (Measurements made Oct. 2) Big Bear Networks, Inc. 5

16 TIA 2-96 m MMF Round Robin: OSL Results BER Orange -Green -Blue 2-Orange 2-Green 2-Blue -Aqua -Blue -Violet NMCP2_B2B Measurements made with discrete FFE and DFE IC s Limited dynamic capability for these tests OMA (dbm) (Measurements made Oct. 2) Big Bear Networks, Inc. 6

17 Discussion & Next Steps Simulations DFE architecture required for m performance Will repeat with adopted 8 restricted model & OM Monte Carlo model as provided by the channel ad-hoc group Additionally, will need to include connector off-sets Experimental 5dB PIE-D budget covered all m TIA 2-96 fibres for CL.5dB PIE-D budget covered all m TIA 2-96 fibres with OSL (in & out of spec fibers) High off-set connectors will impact budget required Likely dependent on launch condition specified BER testing: 6.5-dB power budget for OSL NB: includes EDC implementation penalty and un-equalized dynamic effects of the 2-chip set-up Additional testing with the agreed connector/channel from the channel ad-hoc sub-task group planned Early implementations (circa Q2 2) demonstrate m over FDDI-grade fiber is challenging but possible Big Bear Networks, Inc.

18 Back up Big Bear Networks, Inc. 8

19 db CL TIA 2-96 Set PIE Metrics for CL and OSL b w b w b w b w b w b w b w b w b w cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl f, orng PIE-D /OFL f2, grn f, blu f4, 2orng f5, 2green f6, 2blue f, aqua f8, blue f9, violet /GHz db b w b w b w b w b w b w b w b w b w cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl cl f, orng PIE-L /OFL f2, grn f, blu f4, f5, 2orng 2green f6, 2blue f, aqua f8, blue f9, violet /GHz db OSL m w b m b w b w b w b w b w b w 2um osl um- um- um- um- um- um- um- um- um- um- um- um- um- um- umf, orng PIE-D /OFL f2, grn f, blu f4, 2orng f5, 2green f6, 2blue f, aqua f8, blue f9, violet /GHz db m w b m b w b w b w b w b w b w 2um osl um- um- um- um- um- um- um- um- um- um- um- um- um- um- umf, orng PIE-L /OFL f2, grn f, blu f4, 2orng f5, 2green f6, 2blue f, aqua f8, blue f9, violet /GHz Big Bear Networks, Inc. 9

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