Influence of temperature and dose rate on radiation-induced attenuation at 1542  nm in fluorine-doped fibers

Abstract

Radiation-induced attenuation (RIA) at 1542 nm of fluorine-doped fibers under gamma radiation source has been investigated for different dose rates and temperatures. Both the temperature and dose rate dependencies are unusual. First, the fiber presents an enhanced low dose rate sensitivity that is favored by increasing temperature. Furthermore, in certain conditions, RIA increases with irradiation temperature, which is a very rare phenomenon. We have built a phenomenological model that shows that these behaviors can be explained considering that two color centers previously identified in the literature are responsible for RIA: inherent and strain-assisted self-trapped holes.

Radiation-induced attenuation in aluminum- and aluminum-thulium-doped optical fibers

“…ELDRS in dielectrics was explained with simulations consisting of solving kinetic equations [29] or with analytical models [30]. It was previously observed in fibers with other doping elements (Er in [31], P in [32] and F in [33]), but we believe it is the first time that it is observed in Al-doped fibers. While this effect could be a flaw for dose measurement, it remains less than 20% in these ranges, which might be an acceptable error for some applications such as routine personal dose monitoring [34].…”