Modelling radiation-effects in semiconductor lasers for use in SLHC experiments

Abstract

Optical link components in the SLHC inner detectors are to be exposed to intense radiation fields during operation, and, hence, their qualification in terms of radiation tolerance is required. We have created a model that describes a semiconductor laser undergoing irradiation to enable the extrapolation to full lifetime total fluences from lower fluence radiation tests. This model uses a rate-equation approach with modified gain calculation that takes thermal rollover into account. The model is used to fit experimental data obtained during high-fluence (in excess of 10 15 particles/cm 2) neutron and pion irradiation tests and evaluate its prediction capability.

Irradiation of new optoelectronic components for HL-LHC data transmission links

“…-1 - published design of silicon optical modulators is the pn. The main difference is the use of various waveguide geometries, and junction orientation [2][3][4][5][6][7][8][9][10][11][12].…”

Optical fibre communication cables systems performance under harmful gamma irradiation and thermal environment effects

“…Moreover, because of the high quality of the pulses and return-to-zero nature of the data the soliton data is suitable for all-optical processing. The power forward current curves of different types of vertical cavity surface emitting laser (VCSEL) devices were given in [16], with remarkable non-linearity, whereas in [17] it was depicted in linear fashion. Based on the data of [18], the following non-linear thermal relations for the set of the selected devices were carried out…”

“…Proposed operating parameters for optical fibre cable under thermal gamma irradiation field[1,5,11,16,22] …”

Versatile Transceiver developments

“…Figure 8 compares the relative impact of 20 MeV neutrons and 300 MeV/c pions on the responsivity and leakage current of the devices tested. Results from the lasers are presented elsewhere [10].…”