Study on a fiber optic gradient hydrophone based on interferometer

Wenlei Lv; Meng Pang; Qingping Shi; Min Zhang; Yanbiao Liao; Libo Yuan; Chong Kang

doi:10.1117/12.805496

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27 January 2009 Study on a fiber optic gradient hydrophone based on interferometer

Wenlei Lv, Meng Pang, Qingping Shi, Min Zhang, Yanbiao Liao, Libo Yuan, Chong Kang

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Proceedings Volume 7156, 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments; 71561E (2009) https://doi.org/10.1117/12.805496
Event: International Conference of Optical Instrument and Technology, 2008, Beijing, China

Abstract

We proposed a kind of fiber-optic gradient hydrophone based on interferometer. Two arms of the interferometer are sensing fibers, each of which can be regard as a scalar pressure sensing element, and then the phase gradient between the two elements is transformed into the light intensity modulated output by the coupler. In this paper, a suit of analytical models for researching the sensor performance are developed. The theoretical and experimental research was carried out to demonstrate this kind of gradient hydrophone's phase sensitivity as the function of the measure frequency and the "8" directivity response.

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Wenlei Lv, Meng Pang, Qingping Shi, Min Zhang, Yanbiao Liao, Libo Yuan, and Chong Kang "Study on a fiber optic gradient hydrophone based on interferometer", Proc. SPIE 7156, 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments, 71561E (27 January 2009); https://doi.org/10.1117/12.805496

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