Modeling and analyzing the temperature sensitivity of radiation-induced attenuation in a Ge-P co-doped fiber

Abstract

A model for the temperature sensitivity of radiation-induced attenuation (RIA) is investigated. The RIA spectra in a germanium (Ge) and phosphorous (P) co-doped fiber ranging from 825 to 1600 nm at different temperatures are measured and decomposed according to the configurational coordinate model. It is found that there is a linear relationship between the parameters of the color center absorption band and temperature. The model is verified at 850, 1310, and 1550 nm by both simulation and experiment. This work will be useful to research on the applications of optical fiber sensors in a complicated space environment.

A radiation–temperature coupling model of the optical fiber attenuation spectrum in the Ge/P co-doped fiber

“…[21] In Ref. [17], it was found that there was a linear relationship between the parameters of color center absorption band and temperature. The fitting formula of the Gaussian band can be expressed as…”

“…The formula for the temperature sensitivity of the RIA in the Ge/P co-doped fiber is shown in Ref. [17].…”

“…The temperature dependence of the color center absorption is proposed as an important factor influencing the RIA behavior of post-irradiation fibers besides the thermally driven color center generation, conversion, and annealing process. [15] In our previous work, [16,17] a model for the temperature sensitivity of the RIA was investigated and it was found that there was an approximate linear relationship between the parameters of the color center absorption band and temperature. Nev-ertheless, no studies to date have considered the influence of radiation and temperature on RIA at the same time.…”