We investigated the radiation hardening of optical fiber amplifiers operating in space environments. Through audreal-time analysis in active configuration, we evaluated the roleudof Ce in the improvement of the amplifier performance againstudionizing radiations. Ce-codoping is an efficient hardening solution, acting both in the limitation of defects in the host glass matrix of RE-doped optical fibers and in the stabilization of lasing properties of the Er3+-ions. On the one hand, in the nearinfraredudregion, radiation induced attenuation measurements show the absence of radiation induced P-related defect species in host glass matrix of the Ce-codoped active fibers; on the otherudhand, in the Ce-free fiber, the higher lifetime variation shows stronger local modifications around the Er3+-ions with the absence of Ce.
展开▼
