Accurate Determination of the Temperature Sensitivity of UV-Induced Fiber Bragg Gratings.

ABSTRACT: Over the past 18 months, we have performed hundreds of temperature characterizations of fiber Bragg gratings inscribed in different germanium-doped silica glass fibers. Under experimental conditions, the main conclusions are as follows: the temperature dependence of the "temperature gauge factor" or the normalized temperature sensitivity, K_T, was found to be quadratic in the -50-200 °C range, while it may be considered linear for the -20-100 °C range; K_T values at 20 °C vary from 5.176 × 10^-6 K^-1, for a B/Ge co-doped fiber up to 6.724 × 10^-6 K^-1, for a highly Ge-doped fiber; K_T does not depend on the hydrogen-loading process or the gratings coupling strength; K_T is essentiall

SUBMITTER: Cosme M 

PROVIDER: S-EPMC12846186 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature