Temperature Dependence of Radiation-Induced Attenuation of a Fluorine-Doped Single-Mode Optical Fiber at Infrared Wavelengths
Adriana Morana, M. Roche, Cosimo Campanella, Gilles Mélin, Thierry Robin, Emmanuel Marin, A. Boukenter, Y. Ouerdane, Sylvain Girard
Abstract
Harsh environments can combine radiations and extreme temperature constraints, which can both degrade the optical performances of silica-based optical fibers (OFs). Among the different types of OFs, the ones having a core in pure-silica or doped with fluorine are known to present, generally, the lowest steady-state radiation-induced attenuation (RIA) to high cumulated doses ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$>$ </tex-math></inline-formula> 10 kGy) at room temperature. In this work, we investigate how the RIA levels and kinetics of a radiation-hardened F-doped single-mode OF depend on the irradiation temperature. To achieve this, we performed a systematic study on the combined temperature (from −80 °C to 80 °C) and steady-state X-ray radiation (up to 100 kGy) effects on an F-doped single-mode fiber with a high-temperature acrylate coating in the infrared (IR) domain. We then discuss the basic mechanisms at the origin of the RIA and its temperature dependence.