Conveners
Optoelectronics and Links
- Francois Vasey (CERN)
Future upgrades of CERN Experiments will require low power optical data links to support ever-increasing data-rates at ever-higher radiation levels. Silicon Photonics is a CMOS optoelectronics technology compatible with such requirements. We present the results of an optical transceiver proof of concept based on a Silicon Photonic Integrated Circuit coupled to existing radiation tolerant ASICs.
QTRx is an optical transceiver for particle physics experiments. The transmitters, each at 10 Gbps, are based on QLDD and 1x4 VCSEL array. The receivers, with data rates between 2.56 Gbps and 10 Gbps, are based on QTIA and 1x4 photodiode array, GaAs or InGaAs. QTRx is 20 mm × 10 mm × 5 mm and couples to an MT fiber connector. Preliminary tests indicate that QTRx meets design data rates with a...
A prototype optical-link board has been developed for the ATLAS Liquid Argon Calorimeter Phase-2 upgrade. The board consists of 24 lpGBT chips and 8 VTRx+ modules and demonstrates the full optical link design of the future front-end board. The board has 22 simplex optical links to transmit detector data, which are emulated in FPGAs and injected through 6 FMC connectors, to the off-detector...
The Compact Muon Solenoid (CMS) Phase 1 Hadron Calorimeter Upgrade (HCAL) saw the first large-scale use of VTRx modules, optical transceivers designed to be radiation and magnetic field tolerant. During Run II of the Large Hadron Collider, the CMS HCAL experienced a short period of communication loss that revealed a manufacturing weakness in the VTRx affecting nearly half of the communication...
