Radiation hardening of rare-earth doped fiber amplifiers

Abstract

Abstract-We investigated the radiation hardening of optical fiber amplifiers operating in space environments. Through a real-time analysis in active configuration, we evaluated the role of Ce in the improvement of the amplifier performance against ionizing 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 Er 3+ -ions. On the one hand, in the nearinfrared region, 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 other hand, in the Ce-free fiber, the higher lifetime variation shows stronger local modifications around the Er 3+ -ions with the absence of Ce.

Optical Fiber-Based Monitoring of X-ray Pulse Series from a Linear Accelerator

“…The optical fiber material can be radiation hardened by reducing the concentration impurities or using fluorine to adjust the silica refractive index [25]. However, other dopants are also interesting for this aspect, e.g., it was shown that the Ce-codoping of rare-earth-doped optical fibers efficiently limits the infrared RIA [26,27].…”

Radiation-hardened nano-particles-based Erbium-doped fiber for space environment

“…However, whereas strong RIA reduction can be attained at signal wavelength [9], the insufficient RIA lowering at pump wavelength leads to complex Er-Yb double cladding optical fiber design, resulting in huge transparency power, thus to poor optical efficiency. Whereas such a fiber is suitable for specific high optical power applications, it cannot meet most satellite application requirements, in which power consumption is a key parameter.…”