A novel method for length of chirped fiber Bragg grating sensor

Zhenwei Li; Peng Wei; Taolin Liu

doi:10.1117/12.2317545

5 March 2018 A novel method for length of chirped fiber Bragg grating sensor

Zhenwei Li, Peng Wei, Taolin Liu

Proceedings Volume 10710, Young Scientists Forum 2017; 107101Q (2018) https://doi.org/10.1117/12.2317545
Event: Young Scientists Forum 2017, 2017, Shanghai, China

Abstract

Length of chirped fiber Bragg grating sensor is very important for detonation velocity. Different from other ways, we proposed a novel method based on the optical frequency domain reflection theory to measure the length of chirped fiber grating sensor in non-contact condition. This method adopts a tunable laser source to provide wavelength scanning laser, which covers the Full Width at Half Maximum of spectrum of the chirped fiber Bragg grating sensor. A Michelson interferometer is used to produce optical interference signal. Finally, the grating’s length is attainable by distance domain signal. In theory, length resolution of chirped fiber Bragg grating sensor could be 0.02 mm. We perform a series of length measurement experiments for chirped fiber grating sensor, including comparison experiments with hot-tip method. And the experiment results show that the novel method could accurately measure the length of chirped fiber Bragg grating sensors, and the length differences between the optical frequency domain reflection method and the hot-tip probe method are very small.

Citation Download Citation

Zhenwei Li, Peng Wei, and Taolin Liu "A novel method for length of chirped fiber Bragg grating sensor", Proc. SPIE 10710, Young Scientists Forum 2017, 107101Q (5 March 2018); https://doi.org/10.1117/12.2317545

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