Reliable Lifetime Prediction for Passivated Fiber Bragg Gratings for Telecommunication Applications

Abstract

This paper is dedicated to the lifetime prediction of Type I Fiber Bragg gratings (FBG) and to problems that happen when stabilization (also called passivation) conditions or the industrial conditioning procedure depart from ageing ones (e.g., presence of hydrogen during the passivation process). For the first time, a reliable procedure to certify the predicted lifetime based on a "restricted" master curve built on real components (i.e., passivated FBG) is presented. It is worth noting that both procedures (master curve built on non-passivated or on passivated components) are based on the same model (demarcation energy approximation and the existence of a master curve) fed with ageing data (reflectivity decay vs. time and temperature). If the Master Curve (MC) build on passivated components can be derived from the original one, we can certify the lifetime prediction in a reliable manner.

Kinetics of Thermally Activated Physical Processes in Disordered Media

“…However, a process like decoration of defect networks with H will not necessarily be relevant to a thermally activated process. In this paper, we consider only processes involving the distribution of activation energies as it is seen that this approach yield good results [1,5,6] with regards to the problem of index stability.…”