the versatile link feasibility demonstration (project phase ii) · 2012. 2. 27. · sm lr-sfp+ trx...

Versatile Link

Versatile Link

The Versatile Link Feasibility Demonstration

(Project phase II)

Francois Vasey, on behalf of the Versatile Link Team

Versatile Link Versatile Link Project

● 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

● 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)

On-Detector Custom Electronics & Packaging

Radiation Hard

Off-Detector Commercial Off-The-Shelf (COTS)

Custom Protocol

29 Sep 2011 [email protected] on behalf of Versatile Link team 2

Versatile Link 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


Versatile Link VL Options and feasibility in March 2011


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

Check GBLD compliance Voltage

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




Versatile Link 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

Versatile Link

Issue 1:

Radiation-Induced Attenuation in the cold

● Optical Fibres will operate well under radiation in the cold

● See D. Hall’s talk, B5b


Dose Rate:

0.66 kGy(Si)/hr

A fibre is qualified if its total RIA is less than 1 dB

D. Hall et al

SM SM

MM MM

Versatile Link


Issue 2: (1/2)

Pin Radiation Induced Responsivity drop

Calorimeter Tracker J. Troska et al

Versatile Link

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

●If MM

●use InGaAs Pin with upgraded transmitter at backend


Versatile Link 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-0000090391


Fibre Type

Radiation Tolerance Grade

Calorimeter-grade Tracker-grade

10 kGy, 5x1014 n/cm2 500 kGy, 2x1015 n/cm2,1x1015 h/cm2

SM

MM

Versatile Link 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) 29 Sep 2011 [email protected] on behalf of Versatile Link team 10

Fibre Type

Radiation Tolerance Grade

Calorimeter-grade Tracker-grade

10 kGy, 5x1014 n/cm2 500 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

Versatile Link COTS SM SFP+ TRx


A. Prosser et al.

Measurement Norm

OMA -3.6 dBm*

Rx Sensitivity -12.6 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 0.25 of UI

Tx Deterministic Jitter 0.12 of UI

Rx Total Jitter 0.34 of UI

Rx Deterministic Jitter 0.14 of UI

* Tracker Grade Version

OMA

Rx Sens

ER_Tx

Eye_Tx

1/Rise_Tx

1/Fall_Tx

1/TJ_Tx

1/DJ_Tx

1/TJ_Rx

1/DJ_Rx

Vendor 1

Vendor 1

Vendor 2

Vendor 2

Vendor 2

Vendor 2

Vendor 2

Vendor 2

Vendor 3

Vendor 3

Vendor 4

Target

Versatile Link MM Parallel Device Testing at 5 Gbps


A. Prosser et al.

Versatile Link

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)


Versatile Link GBLD V3 + SM EEL


C. Soos et al.

Versatile Link GBLD V3 + MM VCSEL


C. Soos et al.

Versatile Link

● Optical connector interface

designed and fabricated

using rapid 3D prototyping

● Different materials

● Different designs


Issue 4: (1/2)

VTRx prototype demonstration

● Several VTRx prototype versions

built and tested

● SM, MM

● GBLD, TI-ONET LDD

● See C. Soos’ talk, B5b

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, B5b


Issue 4: (2/2)

VTRx prototype demonstration

Versatile Link SEU Test of VTRx prototype

● VTx


● VRx

J. Troska et al.

SM

MM

Versatile Link In System Performance of VTRx

● BER @ RT vs -30/+70

● Uplink

● Downlink


PRELIMINARY

A. Xiang et al.

SM downlink

MM uplink

Versatile Link VL project status, Sep 2011



EE laser, 1310nm

GBLD Drive current OK

SM LR-SFP+ TRx

VCSEL, 1310nm

GBLD compliance Voltage OK

Board-edge Rx


InGaAs PIN, 1310nm

Opto Engine Rx


VCSEL, 850nm

GBLD compliance Voltage OK

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



TK

grade

Calo

&

Tk

grade

Versatile Link 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

oRx

oTx

oRx

oTx

oRx

oTx

oRx

oRx oRx oRx

oTx splitter

oRx

oRx

oTx

oRx

oTx

oTx

oTx

oRx oRx oRx

oTx

oRx

Versatile Link Towards Versatile Link Project Phase III


Common R&D

Generic Tendering 2015 (depending on users commitment)

Detector specific R&D 2020

VL Phase II

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)

Versatile Link 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/


Versatile Link 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.


Versatile Link 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


the versatile link feasibility demonstration (project phase ii) · 2012. 2. 27. · sm lr-sfp+ trx...

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