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arXiv · 2610.38609

Stability Study of Photo-inscribed Bragg Gratings in Sapphire Fibers at Very High Temperature

Antoine Bourel·Léo Colliard·Thomas Blanchet·Guillaume Laffont·Sylvain Magne·Geraud Bouwmans
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Abstract

Fiber Bragg gratings inscribed by femtosecond laser in sapphire fibers were subjected to thermal cycling up to 1500$\degree$C. Adding a multimode silica fiber reduces modal interference, improves the quality of the Bragg spectrum and the measurement accuracy. The measurement uncertainty is about 1.9$\degree$C at 1500$\degree$C.

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Antoine Bourel, Léo Colliard, Thomas Blanchet, Guillaume Laffont, Sylvain Magne, Geraud Bouwmans. 2026-10-28. Stability Study of Photo-inscribed Bragg Gratings in Sapphire Fibers at Very High Temperature. https://arxiv.org/abs/2610.38609

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