High-temperature and stress response behavior of femtosecond laser pulses inscribed eccentric fiber Bragg gratings

Jiang, Peng, Xu, Qiang, Zhang, Rui, Bai, Haiping, Li, Kang, Copner, Nigel and Gong, Yongkang 2023. High-temperature and stress response behavior of femtosecond laser pulses inscribed eccentric fiber Bragg gratings. Heliyon 9 (6) , e17185. 10.1016/j.heliyon.2023.e17185

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Abstract

Eccentric fiber Bragg grating (EFBG) is inscribed in standard communication single-mode fiber using femtosecond laser pulses, and the temperature and strain sensing characteristics are experimentally demonstrated and analyzed. The EFBG exhibits strong thermal stability and good robustness in high-temperature measurement up to 1000 °C, and undergoes different thermal sensitivities during Bragg peak and the strong resonance coupled cladding spectral comb. The temperature sensitivity linearly increases with respect to the effective index of the resonant modes. Such a situation also occurs in axial strain measurement. These characteristics are of high interest for multiparametric sensing at high temperatures.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Additional Information:	License information from Publisher: LICENSE 1: URL: http://creativecommons.org/licenses/by-nc-nd/4.0/, Start Date: 2023-06-09
Publisher:	Elsevier
ISSN:	2405-8440
Date of First Compliant Deposit:	12 June 2023
Date of Acceptance:	9 June 2023
Last Modified:	13 Jun 2023 04:27
URI:	https://orca.cardiff.ac.uk/id/eprint/160313

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