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Proceedings Paper

Resonant wavelength thermal stability of femtosecond FBGs
Author(s): Tiago Paixão; Francisco Araújo; Luís Ferreira; Paulo Antunes
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Paper Abstract

We report on a thermal stability study of the resonant wavelength of fiber Bragg gratings fabricated by femtosecond laser. We propose a new method to analyze the decay of the central wavelength shift of Bragg gratings based on isothermal and isochronal processes up-to a maximum temperature of 800°C. The obtained thermal decay follows a typical power-law function, which allowed us to fit theoretical equations to our experimental data and simulate the refractive index decay. A method to mitigate this decay is proposed and the results demonstrate the potential of using femtosecond fiber Bragg gratings as high temperature sensors.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103236L (23 April 2017); doi: 10.1117/12.2263558
Show Author Affiliations
Tiago Paixão, Univ. de Aveiro (Portugal)
Francisco Araújo, HBM FiberSensing, S.A. (Portugal)
Luís Ferreira, HBM FiberSensing, S.A. (Portugal)
Paulo Antunes, Univ. de Aveiro (Portugal)
Instituto de Telecomunicações (Portugal)


Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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