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Conferences > CLEO_Europe > 2023 > ch_p > ch_p_13
  • Conference on Lasers and Electro-Optics/Europe (CLEO/Europe 2023) and European Quantum Electronics Conference (EQEC 2023)
  • Technical Digest Series (Optica Publishing Group, 2023),
  • paper ch_p_13

High Temperature Performance of Femtosecond Laser Written FBGs

Robin Elliott, Timothy Lee, Martynas Beresna, Morten Ibsen, and Gilberto Brambilla

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Abstract

High temperature fibre Bragg gratings (FBGs) are essential for certain harsh environment sensing applications. Unlike traditional UV-written type I FBGs, femtosecond laser written silica FBGs can offer higher thermal stability >1000 °C [1, 2]. Here, we investigate different fs-laser FBG inscription parameters to not only achieve high temperature stability, but also explore the FBG structural and spectral changes in the less-well studied extreme temperature (1300 °C) softening and failure regime, including by tapering the heated FBGs.

© 2023 IEEE

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