Coupled experiment/simulation approach for the design of radiation-hardened rare-earth doped optical fibers and amplifiers

摘要: We developed an approach to design radiation-hardened rare earth -doped fibers and amplifiers. This methodology combines testing experiments on these devices with particle swarm optimization (PSO) calculations. The composition of Er/Yb-doped phosphosilicate was improved by introducing Cerium inside their cores. Such strongly reduces the amplifier radiation sensitivity, limiting its degradation: we observed a gain decreasing from 19 dB 18 after 50 krad whereas previous studies reported higher degradations up 0°dB at such doses. PSO calculations, taking only into account effects absorption efficiency around pump emission wavelengths, correctly reproduce general trends experimental results. calculation tool has been used study influence response. fiber length ensure optimal amplification before irradiation may be rather defined adjusted optimize performance over whole space mission profile than integration in harsh environments. Both forward backward pumping schemes lead same kind degradation our active fibers. By using this promising coupled approach, amplifiers nearly insensitive radiations designed future.