High-frequency interferometric optical fiber hydrophone based on acoustic resonance isolation

Kang Lou; Cheng-yan Peng; Yong-chao Zou; Jun Wang; Yang Lu; Pan Xu; Zheng-liang Hu

doi:10.1117/12.2587157

12 March 2021 High-frequency interferometric optical fiber hydrophone based on acoustic resonance isolation

Kang Lou, Cheng-yan Peng, Yong-chao Zou, Jun Wang, Yang Lu, Pan Xu, Zheng-liang Hu

Proceedings Volume 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications; 1176355 (2021) https://doi.org/10.1117/12.2587157
Event: Seventh Symposium on Novel Photoelectronic Detection Technology and Application 2020, 2020, Kunming, China

Abstract

We propose and demonstrate a high-frequency interferometric optical fiber hydrophone based on acoustic resonance isolation. Novel air chambers are introduced into common type of mandrel sensitization structure to prevent acoustic resonance which occurs inside the inner cylindrical cavity of hydrophone frame at specific high frequency acoustic filed. 1kHz-30kHz frequency response of this new kind of hydrophone is measured in a lake. Experiment shows that, by this acoustic structure optimization, the working frequency bandwidth of optical fiber hydrophone, whose acoustic pressure sensitivity is-147dB, is expanded from 10kHz to above 30kHz.

Citation Download Citation

Kang Lou, Cheng-yan Peng, Yong-chao Zou, Jun Wang, Yang Lu, Pan Xu, and Zheng-liang Hu "High-frequency interferometric optical fiber hydrophone based on acoustic resonance isolation", Proc. SPIE 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications, 1176355 (12 March 2021); https://doi.org/10.1117/12.2587157

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