Versatile Link The Versatile Link Feasibility Demonstration Project
Versatile Link The Versatile Link Feasibility Demonstration (Project phase II) Versatile Link Francois Vasey, on behalf of the Versatile Link Team
Versatile Link Project ● ● Optical Physical layer linking front- to back-end Bidirectional, ~5 Gbps Versatile ● Multimode (850 nm) and Singlemode (1310 nm) versions ● Point to Point and Point to Multipoint architectures Front-end pluggable module ● ● Joint Project Proposal submitted to ATLAS & CMS upgrade steering groups in 2007 and endorsed in 2008 Project Kick-off: April 2008 ● Phase I: Proof of Concept (18 mo) ● ● ● 29 Sep 2011 Versatile Link Phase II: Feasibility Study (18 mo) Phase II: Consolidation (6 mo) Phase III: Pre-production readiness (18 mo) On-Detector Off-Detector Custom Electronics & Packaging Radiation Hard Commercial Off-The-Shelf (COTS) Custom Protocol francois. vasey@cern. ch on behalf of Versatile Link team 2
VL Versatility Versatile Link Front-End VTRx Fibre Back-End TRx EE laser, 1310 nm SM LR-SFP+ TRx VCSEL, 1310 nm SNAP 12’like Rx In. Ga. As PIN, 1310 nm Opto Engine Rx VCSEL, 850 nm MM SR-SFP+ TRx Ga. As PIN, 850 nm SNAP 12’like Tx, Rx, TRx In. Ga. As PIN, 850 nm Opto Engine Tx, Rx, TRx 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 3
VL Options and feasibility in March 2011 Front-End VTRx Fibre Back-End TRx EE laser, 1310 nm SM LR-SFP+ TRx Versatile Link GBLD Drive current limitation VCSEL, 1310 nm SNAP 12’like Rx Check GBLD compliance Voltage SM Tx not (yet) available In. Ga. As PIN, 1310 nm Opto Engine Rx SM Tx not (yet) available VCSEL, 850 nm MM SR-SFP+ TRx Check GBLD compliance Voltage Tx OMA to meet power budget Ga. As PIN, 850 nm SNAP 12’like Tx, Rx, TRx Responsivity drop under irradiation Tx OMA to meet power budget In. Ga. As PIN, 850 nm Opto Engine Tx, Rx, TRx Responsivity/Leakage to be confirmed RIA in cold at low dose rate 29 Sep 2011 Tx OMA to meet power budget francois. vasey@cern. ch on behalf of Versatile Link team 4
Consolidation Phase: March-Sept 2011 Versatile Link ● Consolidation Phase launched to address following issues: ● Power budget 1 ● In-detector fibre: Radiation Induced Attenuation in the cold 2 ● Front-end Pin: Radiation Induced Responsivity Drop ●Back-end Tx: High OMA requirement downstream ● VTRx feasibility 3 ● GBLD ●availability ●VCSEL compliance voltage ●Edge Emitter drive current 4 ● Full prototype demonstration ● High Density Back-End Components Survey 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 5
Issue 1: Radiation-Induced Attenuation in the cold Versatile Link ● Optical Fibres will operate well under radiation in the cold ● See D. Hall’s talk, B 5 b A fibre is qualified if its total RIA is less than 1 d. B SM Dose Rate: 0. 66 k. Gy(Si)/hr SM MM MM D. Hall et al 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 6
Issue 2: (1/2) Pin Radiation Induced Responsivity drop Calorimeter 29 Sep 2011 Tracker francois. vasey@cern. ch on behalf of Versatile Link team Versatile Link J. Troska et al 7
Issue 2: (2/2) Pin Radiation Induced Responsivity drop Versatile Link ● Only an issue at high fluences for MM Ga. As Pin diodes ● Calorimeter grade Versatile Link ●If MM ●use standard Ga. As MM pins ●use COTS transmitter at backend ● Tracker grade Versatile Link ●If SM ●use In. Ga. As Pin ●use «COTS» transmitter (LR) at backend ●If MM ●use In. Ga. As Pin with upgraded transmitter at backend 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 8
Versatile Link System Specification Versatile Link ● Four Versatile Link flavours defined Fibre Type Radiation Tolerance Grade Calorimeter-grade Tracker-grade 10 k. Gy, 5 x 1014 n/cm 2 500 k. Gy, 2 x 1015 n/cm 2, 1 x 1015 h/cm 2 SM MM ● Power budget specified with margin for all flavours ● Jitter budget adapted from FC 4 G standard ● Specs available as EDMS document CERN-0000090391 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 9
Back End components Versatile Link ● Can be COTS, except in Tracker grade MM(850 nm) link Fibre Type Radiation Tolerance Grade Calorimeter-grade Tracker-grade 10 k. Gy, 5 x 1014 n/cm 2 500 k. Gy, 2 x 1015 n/cm 2, 1 x 1015 h/cm 2 SM Min Tx OMA: -5. 2 d. Bm Min Tx OMA: -3. 6 d. Bm MM Min Tx OMA: -3. 2 d. Bm Min Tx OMA: -1. 6 d. Bm ● Several SFP+ TRx modules successfully evaluated ● Parallel optics under evaluation ● See A. Prosser’s poster (optoelectronics and links) 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 10
COTS SM SFP+ TRx Versatile Link OMA Vendor 1 1/DJ_Rx Vendor 1 Rx Sens Vendor 2 1/TJ_Rx ER_Tx Vendor 2 Vendor 3 1/DJ_Tx Eye_Tx Vendor 4 Target 1/TJ_Tx 1/Rise_Tx 1/Fall_Tx A. Prosser et al. Measurement Norm OMA Rx Sensitivity Ext. Ratio Tx. Eye Opening Tx Rise Time Tx Fall Time Tx Total Jitter Tx Deterministic Jitter Rx Total Jitter Rx Deterministic Jitter -3. 6 d. Bm* -12. 6 d. Bm 3. 0 d. B 60% of OMA 70 ps 0. 25 of UI 0. 12 of UI 0. 34 of UI 0. 14 of UI * Tracker Grade Version 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 11
MM Parallel Device Testing at 5 Gbps Versatile Link A. Prosser et al. 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 12
Issue 3: GBLD ASIC availability Versatile Link ● GBLD-V 3 assembled on VTRx: ● Functional (marginally, with Zinput matching circuit) ● Drives VCSEL and Edge Emitter ● See C. Soos’ talk, B 5 b ● GBLD-V 4 redesign ● To be submitted in Nov 2011 ● See G. Mazza’s poster (optoelectronics and links) 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 13
GBLD V 3 + SM EEL Versatile Link C. Soos et al. 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 14
GBLD V 3 + MM VCSEL Versatile Link C. Soos et al. 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 15
Issue 4: (1/2) VTRx prototype demonstration ● Optical connector interface designed and fabricated using rapid 3 D prototyping ● Different materials ● Different designs 29 Sep 2011 Versatile Link ● Several VTRx prototype versions built and tested ● SM, MM ● GBLD, TI-ONET LDD ● See C. Soos’ talk, B 5 b francois. vasey@cern. ch on behalf of Versatile Link team 16
Issue 4: (2/2) VTRx prototype demonstration Versatile Link ● SEU test of complete assembly ● See J. Troska’s poster (optoelectronics and links) ● In-system performance being evaluated ● A. Xiang, SMU ● Interfaces to higher system level being prepared ● See P. Vichoudis’ talk, B 5 b 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 17
SEU Test of VTRx prototype Versatile Link ● VRx ● VTx MM SM J. Troska et al. 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 18
In System Performance of VTRx Versatile Link ● BER @ RT vs -30/+70 ● Uplink ● Downlink MM uplink SM downlink 29 Sep 2011 PRELIMINARY A. Xiang et al. francois. vasey@cern. ch on behalf of Versatile Link team 19
VL project status, Sep 2011 Front-End VTRx EE laser, 1310 nm Ve rs GBLD Drive current OK Fibre Back-End TRx SM LR-SFP+ TRx at ile VCSEL, 1310 nm GBLD compliance Voltage OK Li nk In. Ga. As PIN, 1310 nm VCSEL, 850 nm MM Board-edge Rx Fe as ib SM Tx not (yet) available ilit y SM Tx not (yet) available De Responsivity drop: Calo grade OK 29 Sep 2011 SR-SFP+ TRx m Ga. As PIN, 850 nm Assembly to be confirmed: Tk grade TK grade Opto Engine Rx GBLD compliance Voltage OK In. Ga. As PIN, 850 nm Versatile Link RIA in cold at low dose rate OK on. Tx OMA to meet Tk power budget st ra Board-edge Tx, Rx, TRx t eto meet Tk power budget Tx OMA d Calo & Tk grade Opto Engine Tx, Rx, TRx Tx OMA to meet Tk power budget francois. vasey@cern. ch on behalf of Versatile Link team 20
Fallbacks for Tk-grade back-end transmitters Versatile Link ● What if SM array transmitters cannot be found? ● Use single channel transmitter in broadcast mode ● Must foresee addressability at GBLD, GBT or GBT-SCA level ● SM PLC splitters tested and found to be radiation resistant o. Rx o. Tx o. Rx splitter o. Tx o. Rx o. Tx ● What if MM high power transmitters cannot be found? ● Select SM ● We believe SM and MM parallel optics will be found 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 21
Towards Versatile Link Project Phase III Versatile Link Common R&D VL Phase II Detector specific R&D 2020 Generic Tendering 2015 (depending on users commitment) VL Phase III ● 5 G low power VTRx for Tk application ● ● 10 G opto engine Vn. Tx for Calo application ● 29 Sep 2011 Low power VCSEL driver, small footprint package ● ● ● TOSA (MM) ROSA (Ga. As 850) Fibre (MM) TRx (MM-calo) Opto-engine (MM-calo) Driver array, VCSEL array, package francois. vasey@cern. ch on behalf of Versatile Link team 22
Conclusion Versatile Link ● Versatile Link feasibility demonstrated ● Detailed specifications ● Components shortlist ● Irradiation test results ● VTRx prototype ● System demonstrators ● Cost book ● Versatile Link phase III defined ● Completion of generic R&D ● Launch of detector specific R&D for 2020 applications ● Launch of generic tendering for 2015 applications, if commitment ● https: //espace. cern. ch/project-versatile-link/public/ 29 Sep 2011 francois. vasey@cern. ch on behalf of Versatile Link team 23
Credits ● ● Versatile Link CERN ● Jan Troska, Vincent Bobillier, Spyros Papadopoulos, Christophe Sigaud, Csaba Soos, Pavel Stejskal, Sarah Storey, et al. Fermilab ● Alan Prosser, Mark Bowden, John Chramowicz, et al. Oxford ● Todd Huffman, David Hall, Nick Ryder, Tony Weidberg, et al. Southern Methodist University ● 29 Sep 2011 Annie Xiang, Andie Liu, Kent Liu, Jingbo Ye, et al. francois. vasey@cern. ch on behalf of Versatile Link team 24
Downstream Versatile Link Power Budget 29 Sep 2011 Versatile Link ● Tracker-grade back-end transmit power must be boosted to compensate radiation penalties ● Calorimeter-grade power budget compatible with COTS component specs francois. vasey@cern. ch on behalf of Versatile Link team 25
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