Distributed acoustic sensing system using an identical weak fiber Bragg grating array

Sheng Liu; Xinying Han; Hongqiao Wen

doi:10.1117/12.2244770

19 October 2016 Distributed acoustic sensing system using an identical weak fiber Bragg grating array

Sheng Liu, Xinying Han, Hongqiao Wen

Proceedings Volume 10155, Optical Measurement Technology and Instrumentation; 101550O (2016) https://doi.org/10.1117/12.2244770
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China

Abstract

We propose and experimentally demonstrate a distributed acoustic sensing system using an identical weak fiber Bragg grating array. Phase, frequency and location information of vibration can be demodulated by using a path-match interferometry method. 3×3 coupler demodulation technique is employed to eliminate signal fading in interferometer. Experiments on detecting acoustic wave generated by PZT show that the system is capable of measuring vibrations of up to 1000 Hz over 1.6 km with 2.5m spatial resolution.

Citation Download Citation

Sheng Liu, Xinying Han, and Hongqiao Wen "Distributed acoustic sensing system using an identical weak fiber Bragg grating array", Proc. SPIE 10155, Optical Measurement Technology and Instrumentation, 101550O (19 October 2016); https://doi.org/10.1117/12.2244770

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