Optical Specifications of SMF PMDs Study. 400 Gb/s Ethernet Task Force IEEE Interim Meeting 8-10 September 2014 Ottawa, Canada Chris Cole

Transcription

1 Optical Specifications of SMF PMDs Study 400 Gb/s Ethernet Task Force IEEE Interim Meeting 8-10 September 2014 Ottawa, Canada Chris Cole

2 Finisar Contributors Gilles Denoyer Bernd Huebner Jonathan King Chris Kocot William Ling Ilya Lyubomirsky Daniel Mahgerefteh Thelinh Nguyen Thang Pham Jack Xu 8-10 September

3 Duplex SMF & PSM4 PMDs Decision Tree SMF PMDs studied 802.3bs today 50G bit rate per λ 100G NRZ PAM-4 PAM-4 DMT modulation modulation 50Gb/s NRZ 50Gb/s PAM-4 100Gb/s PAM-4 100Gb/s DMT 8-10 September

4 TX Limit, Mux Loss & Modulation Penalty Eye safety limit (1310nm) = 14.1m AOP Mux loss 2:1 ratio 4:1 ratio 8:1 ratio Modulation penalty NRZ PAM-4 DMT-k (25G DML, +/- 3σ clipping) Modulation 5% accuracy penalty = 1.5 = 2.5 = 3.5 = 0.0 = 4.8 = 8.8 = 0.2 DMT-k sub-carrier I & Q channel power split factor penalty Fk = 10 * log10 (2 * k) 8-10 September

5 TDP 2km 2km NRZ PAM September PAM4 PAM4 DMT-k Source Mod Mod DML Mod 25G DML Grid LAN WDM LAN WDM LAN WDM CWDM LAN WDM FEC KP4 KP4 KP4 KP4 BCH Operating BER 2.0e-4 2.0e-4 2.0e-4 2.0e-4 1.0E-03 TX analog BW * RX analog BW * RX FFE taps or FFT pts k TDP Methodology as per cole_3bs_01a_0714, updated with jitter, and residual quantization effects for 100G PAM-4 & DMT * TX & RX analog BW added as per requests from the floor

6 TDP 10km 10km NRZ PAM September PAM4 PAM4 DMT-k Source Mod Mod DML Mod 25G DML Grid LAN WDM LAN WDM LAN WDM LAN WDM LAN WDM FEC BCH BCH BCH BCH BCH Operating BER 1.0E E E E E-03 TX analog BW * RX analog BW * RX FFE taps or FFT pts k TDP Methodology as per cole_3bs_01a_0714, updated with jitter, and residual quantization effects for 100G PAM-4 & DMT * TX & RX analog BW added as per requests from the floor

7 RX Channel Loss & FEC Gain 2km Channel Insertion Loss & MPI Penalty = channel base loss up to 1.0 MPI Penalty 10km Channel Insertion Loss & MPI Penalty = channel base loss up to 0.7 MPI Penalty FEC Optical Gain (vs. 1e-12 BER ) KR4 KP4 BCH (2858, 2570, t=24) = 2.6 = 3.2 = September

8 RX DeMux Loss & Bandwidth Penalty DeMux loss 2:1 ratio 4:1 ratio 8:1 ratio Bandwidth Penalty (vs. 25G NRZ) 50G NRZ 50G PAM-4 100G PAM-4 100G DMT FEC overhead Bandwidth Penalty KR4 (0%) KP4 (3%) BCH (8%) BCH (DMT, 25G DML) = 1.5 = 2.5 = 3.5 = 1.5 = 0.0 = 1.0 = 0.0 = 0.0 = 0.1 = 0.2 = September

9 RX Design Penalty 50G TIA device noise penalty (vs. 25G) = 1.0 Linear TIA AGC noise penalty (vs. Limiting) = 0.5 TIA cross-talk penalty 25G NRZ = G NRZ = G PAM-4 (linear) = G PAM-4 (linear) = G DMT-k (linear) = 0.3 Analog equalizer non-idealities or ADC quantization penalty 50G NRZ 3-tap FFE = G PAM-4 3-tap FFE = G PAM-4 6-bit ENOB ADC = G DMT-k 6-bit ENOB ADC = September

10 400G 2km Duplex SMF PMDs TX Specs TX Specifications Operating BER ER Full Scale (min) 4x25G NRZ LR4 No FEC / DML NRZ 8-10 September PAM4 / DML PAM4 DMT 25G DML 1.0E E E E E TX OMA pre-mux (max) m Mux Loss TX OMA (max) m Modulation Penalty TX OMA Eye (max) m TDP (max) Fk Fk TX OMA Eye - TDP each lane (min) m Fk

11 400G 2km Duplex SMF PMDs RX Specs RX Specifications Symbol (or Sample) Rate Gbaud (or GS) Operating BER TX OMA Eye - TDP each lane (min) m Channel Insertion Loss & MPI penalty NRZ 4x25G LR4 No FEC / DML NRZ 8-10 September PAM4 / DML PAM4 DMT 25G DML E E E E E Fk RX Sens. OMA pre-fec each lane (max) m Fk FEC Optical Gain v. 1e-12 BER DeMux Loss + Lane BW Penalty TIA, Xtalk, Quantization Penalties Fk RX Sens. OMA post- DeMux v. LR4 m

12 400G 2km Duplex SMF PMDs Comparison 400G 2km specs minus LR4 specs 4x25G NRZ no FEC & DML NRZ PAM-4 DML PAM-4 DMT-K 25G DML TX OMA delta (pre-mux) RX Sens. delta (post-demux) Every RX Sens. delta is idealized, incomplete, and optimistic 8-10 September

13 400G () PSM4 PMDs TX Specs TX Specifications CWDM Grid Operating BER ER Full Scale (min) 4x25G NRZ CWDM4 KR4 / DML 2x50G NRZ 8-10 September x50G PAM4 / DML 1x100G PAM4 1x100G DMT 25G DML 5.0E E E E E TX OMA pre-mux (max) m Mux Loss TX OMA (max) m Modulation Penalty TX OMA Eye (max) m TDP (max) Fk Fk TX OMA Eye - TDP each lane (min) m Fk

14 400G () PSM4 PMDs RX Specs RX Specifications CWDM Grid Symbol (or Sample) Rate GBaud (or GS) Operating BER TX OMA Eye - TDP each lane (min) m Channel Insertion Loss & MPI penalty 4x25G NRZ CWDM4 KR4 / DML 2x50G NRZ 8-10 September x50G PAM4 / DML 1x100G PAM4 1x100G DMT 25G DML E E E E E Fk RX Sens. OMA pre-fec each lane (max) m Fk FEC Optical Gain DeMux Loss + Lane BW Penalty TIA, Xtalk, Quantization Penalties Fk RX Sens. OMA post- DeMux v. CWDM4 m

15 400G () PSM4 PMDs Comparison 2km specs minus CWDM4 Specs 4x25G NRZ KR4 FEC & DML 2x50G NRZ 2x50G PAM-4 DML 1x100G PAM-4 1x100G DMT-K 25G DML TX OMA delta (pre-mux) RX Sens. delta (post-demux) Every RX Sens. delta is idealized, incomplete, and optimistic 8-10 September

16 400G 10km Duplex SMF PMDs TX Specs TX Specifications LAN WDM Grid Operating BER ER Full Scale (min) 4x25G NRZ LR4 No FEC / DML NRZ 8-10 September PAM4 / DML PAM4 DMT 25G DML 1.0E E E E E TX OMA pre-mux (max) m Mux Loss TX OMA (max) m Modulation Penalty TX OMA Eye (max) m TDP (max) Fk Fk TX OMA Eye - TDP each lane (min) m Fk

17 400G 10km Duplex SMF PMDs RX Specs RX Specifications LAN WDM Grid Symbol (or Sample) Rate Gbaud (or GS) Operating BER TX OMA Eye - TDP each lane (min) m Channel Insertion Loss & MPI penalty NRZ 4x25G LR4 No FEC / DML NRZ 8-10 September PAM4 / DML PAM4 DMT 25G DML E E E E E Fk RX Sens. OMA pre-fec each lane (max) m Fk FEC Optical Gain v. 1e-12 BER DeMux Loss + Lane BW Penalty TIA, Xtalk, Quantization Penalties Fk RX Sens. OMA post- DeMux v. LR4 m

18 400G 10km Duplex SMF PMDs Comparison 400G 10km specs minus LR4 specs 4x25G NRZ no FEC & DML NRZ PAM-4 DML PAM-4 DMT-K 25G DML TX OMA delta (pre-mux) RX Sens. delta (post-demux) Every RX Sens. delta is idealized, incomplete, and optimistic 8-10 September

19 Optical Specifications of SMF PMDs Study Thank you 8-10 September