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The Versatile Link Feasibility Demonstration (Project phase II)

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Presentation on theme: "The Versatile Link Feasibility Demonstration (Project phase II)"— Presentation transcript:

1 The Versatile Link Feasibility Demonstration (Project phase II)
Francois Vasey, on behalf of the Versatile Link Team

2 Versatile Link Project
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 (18mo) Phase II: Feasibility Study (18mo) Phase II: Consolidation (6mo) Phase III: Pre-production readiness (18mo) Optical Physical layer linking front- to back-end Bidirectional, ~5Gbps Versatile Multimode (850nm) and Singlemode (1310nm) versions Point to Point and Point to Multipoint architectures Front-end pluggable module On-Detector Custom Electronics & Packaging Radiation Hard Off-Detector Commercial Off-The-Shelf (COTS) Custom Protocol 29 Sep 2011 on behalf of Versatile Link team

3 francois.vasey@cern.ch on behalf of Versatile Link team
VL Versatility Front-End VTRx Fibre Back-End TRx EE laser, 1310nm SM LR-SFP+ TRx VCSEL, 1310nm SNAP12’like Rx InGaAs PIN, 1310nm Opto Engine Rx VCSEL, 850nm MM SR-SFP+ TRx GaAs PIN, 850nm SNAP12’like Tx,Rx, TRx InGaAs PIN, 850nm Opto Engine Tx, Rx, TRx 29 Sep 2011 on behalf of Versatile Link team

4 VL Options and feasibility in March 2011
Front-End VTRx Fibre Back-End TRx EE laser, 1310nm GBLD Drive current limitation SM LR-SFP+ TRx VCSEL, 1310nm Check GBLD compliance Voltage SNAP12’like Rx SM Tx not (yet) available InGaAs PIN, 1310nm Opto Engine Rx VCSEL, 850nm MM RIA in cold at low dose rate SR-SFP+ TRx Tx OMA to meet power budget GaAs PIN, 850nm Responsivity drop under irradiation SNAP12’like Tx,Rx, TRx InGaAs PIN, 850nm Responsivity/Leakage to be confirmed Opto Engine Tx, Rx, TRx 29 Sep 2011 on behalf of Versatile Link team

5 Consolidation Phase: March-Sept 2011
Consolidation Phase launched to address following issues: Power budget In-detector fibre: Radiation Induced Attenuation in the cold Front-end Pin: Radiation Induced Responsivity Drop Back-end Tx: High OMA requirement downstream VTRx feasibility GBLD availability VCSEL compliance voltage Edge Emitter drive current Full prototype demonstration High Density Back-End Components Survey 1 2 3 4 29 Sep 2011 on behalf of Versatile Link team

6 Issue 1: Radiation-Induced Attenuation in the cold
Optical Fibres will operate well under radiation in the cold See D. Hall’s talk, B5b A fibre is qualified if its total RIA is less than 1 dB SM SM Dose Rate: 0.66 kGy(Si)/hr MM MM D. Hall et al 29 Sep 2011 on behalf of Versatile Link team

7 Issue 2: (1/2) Pin Radiation Induced Responsivity drop
Calorimeter Tracker J. Troska et al 29 Sep 2011 on behalf of Versatile Link team

8 Issue 2: (2/2) Pin Radiation Induced Responsivity drop
Only an issue at high fluences for MM GaAs Pin diodes Calorimeter grade Versatile Link If MM use standard GaAs MM pins use COTS transmitter at backend Tracker grade Versatile Link If SM use InGaAs Pin use «COTS» transmitter (LR) at backend use InGaAs Pin with upgraded transmitter at backend 29 Sep 2011 on behalf of Versatile Link team

9 Versatile Link System Specification
Four Versatile Link flavours defined Power budget specified with margin for all flavours Jitter budget adapted from FC 4G standard Specs available as EDMS document CERN Fibre Type Radiation Tolerance Grade Calorimeter-grade Tracker-grade 10 kGy, 5x1014 n/cm kGy, 2x1015 n/cm2,1x1015 h/cm2 SM MM 29 Sep 2011 on behalf of Versatile Link team

10 Back End components Can be COTS, except in Tracker grade MM(850nm) link Several SFP+ TRx modules successfully evaluated Parallel optics under evaluation See A. Prosser’s poster (optoelectronics and links) Fibre Type Radiation Tolerance Grade Calorimeter-grade Tracker-grade 10 kGy, 5x1014 n/cm kGy, 2x1015 n/cm2,1x1015 h/cm2 SM Min Tx OMA: -5.2dBm Min Tx OMA: -3.6dBm MM Min Tx OMA: -3.2dBm Min Tx OMA: -1.6dBm 29 Sep 2011 on behalf of Versatile Link team

11 francois.vasey@cern.ch on behalf of Versatile Link team
COTS SM SFP+ TRx Measurement Norm OMA dBm* Rx Sensitivity dBm Ext. Ratio 3.0 dB Tx. Eye Opening 60% of OMA Tx Rise Time 70 ps Tx Fall Time 70 ps Tx Total Jitter of UI Tx Deterministic Jitter 0.12 of UI Rx Total Jitter of UI Rx Deterministic Jitter 0.14 of UI A. Prosser et al. * Tracker Grade Version 29 Sep 2011 on behalf of Versatile Link team

12 MM Parallel Device Testing at 5 Gbps
A. Prosser et al. 29 Sep 2011 on behalf of Versatile Link team

13 Issue 3: GBLD ASIC availability
GBLD-V3 assembled on VTRx: Functional (marginally, with Zinput matching circuit) Drives VCSEL and Edge Emitter See C. Soos’ talk, B5b GBLD-V4 redesign To be submitted in Nov 2011 See G. Mazza’s poster (optoelectronics and links) 29 Sep 2011 on behalf of Versatile Link team

14 francois.vasey@cern.ch on behalf of Versatile Link team
GBLD V3 + SM EEL C. Soos et al. 29 Sep 2011 on behalf of Versatile Link team

15 francois.vasey@cern.ch on behalf of Versatile Link team
GBLD V3 + MM VCSEL C. Soos et al. 29 Sep 2011 on behalf of Versatile Link team

16 Issue 4: (1/2) VTRx prototype demonstration
Optical connector interface designed and fabricated using rapid 3D prototyping Different materials Different designs Several VTRx prototype versions built and tested SM, MM GBLD, TI-ONET LDD See C. Soos’ talk, B5b 29 Sep 2011 on behalf of Versatile Link team

17 francois.vasey@cern.ch on behalf of Versatile Link team
Issue 4: (2/2) VTRx prototype demonstration 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, B5b 29 Sep 2011 on behalf of Versatile Link team

18 SEU Test of VTRx prototype
VTx VRx MM SM J. Troska et al. 29 Sep 2011 on behalf of Versatile Link team

19 In System Performance of VTRx
RT vs -30/+70 Uplink Downlink MM uplink SM downlink PRELIMINARY A. Xiang et al. 29 Sep 2011 on behalf of Versatile Link team

20 Versatile Link Feasibility Demonstrated
VL project status, Sep 2011 Front-End VTRx Fibre Back-End TRx EE laser, 1310nm GBLD Drive current OK SM LR-SFP+ TRx VCSEL, 1310nm GBLD compliance Voltage OK Board-edge Rx SM Tx not (yet) available InGaAs PIN, 1310nm Opto Engine Rx VCSEL, 850nm MM RIA in cold at low dose rate OK SR-SFP+ TRx Tx OMA to meet Tk power budget GaAs PIN, 850nm Responsivity drop: Calo grade OK Board-edge Tx,Rx, TRx InGaAs PIN, 850nm Assembly to be confirmed: Tk grade Opto Engine Tx, Rx, TRx TK grade Versatile Link Feasibility Demonstrated Calo & Tk grade 29 Sep 2011 on behalf of Versatile Link team

21 Fallbacks for Tk-grade back-end transmitters
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 What if MM high power transmitters cannot be found? Select SM We believe SM and MM parallel optics will be found oRx oTx splitter oRx oTx oRx oTx oTx oRx oRx oRx oTx oRx oTx 29 Sep 2011 on behalf of Versatile Link team

22 Towards Versatile Link Project Phase III
Common R&D VL Phase II Detector specific R&D 2020 Generic Tendering 2015 (depending on users commitment) VL Phase III 5G low power VTRx for Tk application Low power VCSEL driver, small footprint package 10G opto engine VnTx for Calo application Driver array, VCSEL array, package TOSA (MM) ROSA (GaAs 850) Fibre (MM) TRx (MM-calo) Opto-engine (MM-calo) 29 Sep 2011 on behalf of Versatile Link team

23 francois.vasey@cern.ch on behalf of Versatile Link team
Conclusion 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 on behalf of Versatile Link team

24 francois.vasey@cern.ch on behalf of Versatile Link team
Credits 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 Annie Xiang, Andie Liu, Kent Liu, Jingbo Ye, et al. 29 Sep 2011 on behalf of Versatile Link team

25 Downstream Versatile Link Power Budget
Tracker-grade back-end transmit power must be boosted to compensate radiation penalties Calorimeter-grade power budget compatible with COTS component specs 29 Sep 2011 on behalf of Versatile Link team


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