10GBASE-S Technical Feasibility RECAP

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10GBASE-S Technical Feasibility RECAP Picolight Cielo Stratos Lightwave Corning CDT-Optical Lucent IBM IEEE P802.3ae Austin, TX November 2001 Plenary meeting 1

10GBASE-S Feasibility supporters Bob Grow, Rich Taborek, Intel Raj Savara, Network Elements Vipul Bhatt, Finisar Krister Fröjdh, Optillion Paul Bottorff, Nortel Networks Ben Brown, Tom Palkert, AMCC Terry Cobb, Avaya Eric Grann, Blaze Rick Rabinovich, Spirent Justin Chang, Quake Technologies Philip Auld, EMCORE Jim Tatum, Honeywell Jeff Warren, Extreme Nov 13, 2001 IEEE P802.3ae Austin 2

Contents Interoperability report Compliance report Public demonstrations Results and summary Progress since October Nov 13, 2001 IEEE P802.3ae Austin 3

Technical feasibility Demonstration of compliance or credible path to compliance to 10GBASE-S D3.3 specifications Interoperability test using 10GBASE-SR transponders using 2 23-1 PRBS data Parameter measurements and performance testing based on IEEE P802.3ae D3.3 specification Nov 13, 2001 IEEE P802.3ae Austin 4

Transponder functional block diagram XSBI Interface Tx DATA <0:15> 16 Tx DATA CLOCK MUX 16:1 Laser Driver Optical Connector SOURCE CLOCK REFERENCE CLOCK Rx DATA <0:15> 16 RECEIVE CLOCK De- MUX 1:16 10 Gb/s Transponder Module CDR Post Amp TIA Optical Connector XSBI interface Directly Modulated 850 nm VCSEL Nov 13, 2001 IEEE P802.3ae Austin 5

Interoperability test description Two 10GBASE-S PMA/PMD modules (Vendor A & B) connected over complete set of 50µm and 62.5µm fiber types operating at 10GBASE-R rate Module electrical interfaces defined by XSBI specifications (clause 51) Optical link stressed using excess optical fiber length Nov 13, 2001 IEEE P802.3ae Austin 6

Target Link Distances and Fiber Types Core Diameter Modal Target Distance Bandwidth (MHz-km) 62.5 m 160 26 meters 62.5 m 200 33 meters 50 m 400 66 meters 50 m 500 82 meters 50 m 2000 300 meters Link distance based on fiber types as specified in IEEE 802.3ae draft document Nov 13, 2001 IEEE P802.3ae Austin 7

Block diagram of test setup Parallel BERT 16 x 644 XSBI 10 GBASE-S Transponder A Tx Rx 1 m pigtail 1 m pigtail 1 m pigtail 1 m pigtail Rx Tx 10 GBASE-S Transponder B Parallel Wrap 161 MHz Clock Link P N Test Pattern: PRBS 2 23-1 Signal Speed 10.3125Gbps Nov 13, 2001 IEEE P802.3ae Austin 8

Interoperability testing results Cable label Fiber type Length Connector # ofmfibers A 2000 MHz-km 300 SC 2 8.00E-13 2000 MHz-km 300 0 B 2000 MHz-km 300 SC 2 0 2000 MHz-km 300 0 D 2000 MHz-km 300 LC 2 2 x FC to LC 1 m jumper (62.5 um receive, 50 um transmit) 0 2000 MHz-km 300 2 x FC to LC 1 m jumper (62.5 um receive, 50 um transmit) 3.00E-13 F 50 um - 400 MHz-km 66 SC 1 0 Near worst case (+/- 50 MHz) G 62.5 um - 160 MHz-km 26 SC 1 2 m SC-SC jumper added (tension relief) 0 Near worst case (+/- 50 MHz) H 50 um - 500 MHz-km 82 SC 1 2 m SC-SC jumper added (tension relief) 0 Near worst case (+/- 50 MHz) I 62.5 um - 200 MHz-km 33 SC 1 2 m SC-SC jumper added (tension relief) 0 Near worst case (+/- 50 MHz) J 50 um 66 SC 2 0 50 um 66 0 K 62.5 um 35 SC 2 2 m SC-SC jumper added (tension relief) 4.90E-13 62.5 um 35 2 m SC-SC jumper added (tension relief) 0 L 2000 MHz-km 360 SC 2 DMD 0.118 (0-23 um) 4.00E-13 2000 MHz-km 360 DMD 0.282 (0-23 um) <1E-12 M 2000 MHz-km 450 SC 2 DMD 0.119 (0-23 um) <1E-12 2000 MHz-km 450 DMD 0.145 (0-23 um) <1E-12 Nov 13, 2001 IEEE P802.3ae Austin 9 Jumpers Results Comments

Testing summary Fiber Type/ Bandwidth Distance % of link length BER 62.5 µm MMF 160 MHz. km 26 100% <10-12 62.5 µm MMF 200 MHz. km 33 100% <10-12 50 µm MMF 400 MHz. km 66 100% <10-12 50 µm MMF 500 MHz. km 82 100% <10-12 50 mm MMF 2000 MHz. km 450 m 150% <10-12 Nov 13, 2001 IEEE P802.3ae Austin 10

Vendor A performance data 11

Link Parameters (Vendor A) Transmit Characteristics Description Value Part 1 Value Part 2 Measured Compliance with 802.3ae Notes Data Rate 10.3125 Gbps 10.3125 Gbps Clock Tolerance < +/-100 ppm < +/-100 ppm No Note 1 Wavelength 853.1 nm 852.2 nm Note 2 RMS Spectral Width 0.2 nm 0.2 nm Note 2, 4 Ave Optical Power -5.6 dbm -3.6 dbm Trise/Tfall 29 psec 33.2 psec 20% - 80% Note 3 OMA 0.370mW (-4.32 dbm) 0.582mW (-2.37 dbm) Peak-peak Note 2 RIN 12 OMA -135 db/hz -135 db/hz Note 5 Ave launch power of OFF transmitter -80 dbm -80 dbm Extinction Ratio 7.2 db 7 db Nov 13, 2001 IEEE P802.3ae Austin 12

Link Parameters (Vendor A) Transmit Characteristics (continued) Description Value Measured Compliance with 802.3ae Notes Encircled Flux @ 19um 95% Note 5 Encircled Flux @ 4.5um 10.3% Note 5 Note 1: Based on vendor specification Note 2: Compliant with triple trade-off table specified in draft 3.2 Note 3: Values are for the slower time, T fall, based on square root of the difference of the squares calculation (IEEE802.3ae Draft 3.2, Clause 52.9.8) using 2 12 GHz filters (1 st O/E, 2 nd Scope) Note 4: Resolution of measurement equipment is 0.1 nm Note 5: Average of randomly-chosen samples Nov 13, 2001 IEEE P802.3ae Austin 13

Link Parameters (Vendor A) Receiver Characteristics Description Value Part 1 Value Part 2 Measured Compliance with 802.3ae Notes Signal speed 10.3125 Gbps 10.3125 Gbps Wavelength Response 840nm (min) 860nm (max) 840nm (min) 860nm (max) No Note 1 Return Loss <12 db <12 db No Note 2 Stressed Receive Sensitivity OMA 0.100mW -10.0 dbm 0.106mW -9.7 dbm Part 2 2 7-1 pattern Nov 13, 2001 IEEE P802.3ae Austin 14

Link Parameters (Vendor A) Receiver Characteristics Description Value Part 1 Value Part 2 Measured Compliance with 802.3ae Notes Receive Sensitivity OMA -13.8 dbm -14.8 dbm Informative Vertical eye closure penalty 3.5 db 3.5 db Receive electrical 3 db cutoff upper frequency <9 GHz <9 GHz Note 1: Response very predictable based on PIN Diode material Note 2: Estimated; consistent with Gigabit Ethernet Nov 13, 2001 IEEE P802.3ae Austin 15

Tx Eye Pattern (Vendor A) Part 1 10Gb E Mask 20% Margin Margin Hits (not mask) Mask (not margin) Measured extinction ratio 7.2 db, T fall = 33.2psec (de-convolved) 2 31-1 PBRS data pattern w/ 2 12 GHz filters (1 st -0/E, 2 nd -Scope) Nov 13, 2001 IEEE P802.3ae Austin 16

Measured BER Curve (Vendor A) Part 1 Stressed Sensitivity 1.00E-03 1.00E-04 1.00E-05 1.00E-06 1.00E-07 1.00E-08 1.00E-09 1.00E-10 1.00E-11 1.00E-12-15 -14.5-14 -13.5-13 -12.5-12 -11.5-11 -10.5-10 Average power [dbm] Nov 13, 2001 IEEE P802.3ae Austin 17

Stressed Receive Input (Vendor A) Reference Tx Stressed eye as measured with the 7.6 GHz Golden receiver. p-p closure = 3.2 db,. Peak closure = 3.5 db Nov 13, 2001 IEEE P802.3ae Austin 18

Encircled Flux Measurement (Vendor A) Random Tx OSA DUTs Encircled Energy Normalized Radial Power Density 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0 5 10 15 20 25 30 Radius in mkm Alignment LED TOSA1 TOSA3 TOSA4 Nov 13, 2001 IEEE P802.3ae Austin 19

Path to compliance (Vendor A) Vendor A Critical Performance Issues Nearly complete set of data taken from each of two modules Path: Verification of compliance through complete testing of production volumes Nov 13, 2001 IEEE P802.3ae Austin 20

Vendor B performance data 21

Link Parameters (Vendor B) Specification Value Part 1 802.3ae 10GBASE-S Value Units Compliance Notes Signal Speed 10.3125 10.3125 GBd TRANSMITTER Wavelength 843 ttc nm - ttc = triple trade-off curve RMS spectral width 0.59 ttc nm - ttc = triple trade-off curve Launch power in OMA -1.3 ttc dbm - ttc = triple trade-off curve Triple trade-off curve No Spectral width not on curve 54.5 Trise/Tfall 35 ps No (fall) Nov 13, 2001 IEEE P802.3ae Austin 22

Link Parameters (Vendor B) continued Transmitter (cont.) Ave. Launch power Extinction ratio RIN 12 OMA Encircled flux Fiber Link Fiber Attenuation Connector Loss Receiver -1.3 3 Value Part 1 Not measured Data not available Not measured Not measured 3.5 1.5 802.3ae 10GBASE-S Value -1.3 3-125 db/hz 19 mm >86% 4.5 mm =< 30% Units db/hz db/km Compliance Notes Assume 1.5 db Stressed Rx -4.8-7.08 dbm No Estimated sensitivity Nov 13, 2001 IEEE P802.3ae Austin 23 dbm db db - - - Eye safe limit = -1.3 dbm Assume 3.5 db/km

Path to compliance (Vendor B) Vendor B Critical Performance Issues Through improvements to IC s and tweaks to laser Transponder B module will be brought into compliance Nov 13, 2001 IEEE P802.3ae Austin 24

Other 10GBASE-S performance demonstrations OFC 2000, March 2001, Baltimore, MD IEEE Interim Meeting, Sep 2000, New Orleans, LA NFOEC 2000, Denver, CO N+I 2001, Sep 2001, Atlanta, GA System interoperability demonstration @ 10GEA booth 10GBASE-SW & SR links with XSBI and XAUI based modules ECOC 2001, Sep 2001, Amsterdam IBM reported 20 Gbit/s link using VCSELs and SiGe driver (r.t. 20 ps, DJ = 11ps) Nov 13, 2001 IEEE P802.3ae Austin 25

10GBASE-S is Technically Feasible Because. Successfully interoperated between two 10GBASE-S module vendors with 150% link distance, 450 m over the least margined fiber type (2000 MHz-km standard fiber). Vendor A demonstrated compliance on all measured parameters Vendor B demonstrated credible path to compliance Compliance or path to compliance were described via a comparison of measured vs IEEE required link parameters Nov 13, 2001 IEEE P802.3ae Austin 26

10GBASE-S is Technically Feasible Because. Multiple vendors exist (2 demonstrated) Picolight Cielo Two other vendors plan to support 10GBASE-S IBM Stratos Lightwave Nov 13, 2001 IEEE P802.3ae Austin 27

Clause 52 Progress since LA meeting Strawpoll indicated strong support for Technical Feasibility of 10GBASE-S (no negative votes) One area all PMDs were asked to address is measurement technique validation In particular, bathtubs were brought up (across all clauses) Nov 13, 2001 IEEE P802.3ae Austin 28

Transmit Waterfall Curve Transponder SN002, 10.664 gig 2^31. Estimates for BERT DJ and receiver random jitter removed. Jitter generation from Transponder not removed since no Golden PLL present. However, jitter generation of golden PLL may be assumed to be roughly equal to the jitter gen of the transponder and hence there would Picolight be no net benefit from adding a golden transmit PLL to this measurement. bathtub Golden Receiver DJ assumed to be 0. If Golden receiver DJ is not 0 then the water fall curve will tend to make the TX look worse than it really is. 0.1 0.01 1. 10 3 1. 10 4 1. 10 5 BERL i BERR i 1. 10 6 BERL_SPEC i 1. 10 7 BERR_SPEC i 1. 10 8 1. 10 9 1. 10 10 1. 10 11 1. 10 12 Nov 13, 2001 0 0.1 0.2 0.3 IEEE 0.4 P802.3ae 0.5 0.6 Austin 0.7 0.8 0.9 1 29 i

Conclusion 10GBASE-S is technically feasible Link operates at BER of <10-12 over all specified link distances/fiber types Multiple vendors creating products for 10GBASE-S PMDs All required subcomponents available All vendors agree that parameters in D3.3 are reasonable and achievable (no changes required) Nov 13, 2001 IEEE P802.3ae Austin 30