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