Resonant wavelength thermal stability of femtosecond FBGs

Tiago Paixão; Francisco Araújo; Luís Ferreira; Paulo Antunes

doi:10.1117/12.2263558

23 April 2017 Resonant wavelength thermal stability of femtosecond FBGs

Tiago Paixão, Francisco Araújo, Luís Ferreira, Paulo Antunes

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103236L (2017) https://doi.org/10.1117/12.2263558
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

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.

Citation Download Citation

Tiago Paixão, Francisco Araújo, Luís Ferreira, and Paulo Antunes "Resonant wavelength thermal stability of femtosecond FBGs", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103236L (23 April 2017); https://doi.org/10.1117/12.2263558

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