High-speed vibration measurement by fiber Bragg gratings with Fourier domain mode locking laser

Tatsuya Yamaguchi; Yukitaka Shinoda

doi:10.1117/12.2263410

23 April 2017 High-speed vibration measurement by fiber Bragg gratings with Fourier domain mode locking laser

Tatsuya Yamaguchi, Yukitaka Shinoda

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103232I (2017) https://doi.org/10.1117/12.2263410
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

We developed a high-speed wavelength-swept laser prototype using Fourier domain mode locking (FDML) and a reflection wavelength measuring system that could rapidly measure a fiber Bragg grating (FBG). The prototype FDML laser incorporated a temperature-controlled optical tunable filter and had a sweep bandwidth of 40 nm in the 1.55 μm wavelength band. This system was able to perform high-speed wavelength sweeping with a sweep frequency of 50.7 kHz and had a temporal resolution of 9.9 μs, which was equivalent to half of the laser’s sweep cycle, due to the FDML laser’s bidirectional swept-wavelength. In this paper, we report on high-speed vibration measurements of several kHz by this system using FBGs.

Citation Download Citation

Tatsuya Yamaguchi and Yukitaka Shinoda "High-speed vibration measurement by fiber Bragg gratings with Fourier domain mode locking laser", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103232I (23 April 2017); https://doi.org/10.1117/12.2263410

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