We investigate the radiation hardness of Reflective Electroabsorption Modulators (REAMs) for fluence levels up to 14 ×10 15 24 GeV p/cm 2 to explore the possibility of utilising REAMs for data ...readout at the High-Luminosity Large Hadron Collider (HL-LHC). The high fluence levels used in the experiment and the online spectral measurements carried out provide significant insight into the radiation damage mechanism. The radiation limits of an architecture based on REAMs are established and compared to LHC and HL-LHC fluence levels.
Detectors involved in the upgrade programme of the LHC will need high-speed optical links to transfer readout and control data. The link front-end will be based on a radiation tolerant ...opto-electronic module, the Versatile Transceiver (VTRx), developed under the Versatile Link project. In this contribution we present a test system and protocol to be used to verify the compliance of the VTRx modules to the specifications, and a Versatile Link demonstrator based on the VTRx and the Gigabit Link Interface Board. Finally, we introduce the Small Footprint VTRx which is being designed for the CMS Tracker upgrade.
The GigaBit Transceiver (GBT) project aims at the design of a radiation tolerant chip set for high speed optical data transmission. The chipset includes the GigaBit Laser Driver (GBLD), a radiation ...tolerant ASIC designed in a standard CMOS 130 nm technology. The GBLD is a laser driver designed to work to up to 5 Gb/s and capable to drive both Vertical Cavity Surface Emitting Lasers (VCSELs) and Edge Emitting Lasers (EELs). The GBLD can provide a modulation current up to 24 mA and a bias current up to 43 mA with the pre-emphasis function to compensate for external capacitive load.
We summarize the results obtained in a series of radiation tests of candidate laser and photodiode components for use in the Versatile Transceiver (VTRx), the front-end component of the Versatile ...Link. We have carried out radiation testing at a full spectrum of sources (neutrons, pions, gammas) and can now compare the results and show that the range of components that meet the radiation tolerance requirements is rather large. In addition, devices have been operated in a high magnetic field to qualify them for use in (HL-) LHC detectors.
The forthcoming increase in rate of data production and radiation levels, associated with the transition to High-Luminosity Large Hadron Collider, necessitates a readout link upgrade. Such upgrade is ...also an opportunity to move to a more efficient network infrastructure through the introduction of new technologies and it is in light of this that we explore the possibility of using a unified optical network architecture based on using Reflective Electroabsorption Modulators at the detector side. We evaluate the performance of the new architecture and investigate the way operating and environmental parameters such as wavelength and temperature affect it.
A new generation FPGA-based Timing, Trigger and Control (TTC) system based on emerging Passive Optical Network (PON) technology is being investigated to potentially replace the existing off-detector ...TTC system used by the LHC experiments. The new system must deliver trigger and data with low and deterministic latency as well as a recovered bunch clock with picosecond-level jitter. This new topology offers major improvements over its predecessor: bi-directionality as well as higher capacity. This paper focuses on the figures of merit used to characterize the TTC-PON system both downstream and upstream, on the techniques used to extract them and on the impact of these first results in optimizing the architecture.
A Single-Event Upset study has been carried out on p-i-n photodiodes from a range of manufacturers. A total of 22 devices of 11 types from six vendors were exposed to a beam of 63 MeV protons. The ...angle of incidence of the proton beam was varied between normal and grazing incidence for three data rates (1.5, 2.0 and 2.5 Gb/s).
Candidate optoelectronic components for use in future data-transmission links at the High-Luminosity Large Hadron Collider (HL-LHC) were irradiated with 20 MeV neutrons at the University Cyclotron in ...Louvain-La-Neuve, Belgium and 24 GeV protons at the CERN PS irradiation facility. The results from this test for multi-channel transmitters, Germanium photodiodes, and Silicon photonics modulators are presented here.
Production of the Versatile transceiver and twin transmitter modules for use in the readout and control systems of upgrading LHC detector systems is starting. We review the performance of the ...prototypes produced so far and show that the modules are ready for production. We outline the commercial actions being taken to procure parts and assemblies and show the production plan for delivering known good parts in the various flavours required for the upgrade projects that will be using them.
Versatile Transceiver developments Troska, J; Bobillier, V; Detraz, S ...
Journal of instrumentation,
01/2011, Letnik:
6, Številka:
1
Journal Article
Recenzirano
Odprti dostop
SLHC experiment upgrades will make substantial use of optical links to enable highspeed data readout and control. The Versatile Link project will develop and assess optical link architectures and ...components suitable for deployment at SLHC. The on-detector element will be a bidirectional opto-electronic module: the Versatile Transceiver (VTRx) that will be based on a commercially available module type minimally customized to meet the constraints of the SLHC on-detector environment in terms of mass, volume, power consumption, operational temperature and radiation environment. This paper brings together the status of development of the VTRx in terms of packaging, environmental testing and functional testing.
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