A fiber-optic hydrophone with an acoustic filter

Zefeng Wang; Yongming Hu; Zhou Meng; Ming Ni; Hong Luo

doi:10.1117/12.754799

26 November 2007 A fiber-optic hydrophone with an acoustic filter

Zefeng Wang, Yongming Hu, Zhou Meng, Ming Ni, Hong Luo

Proceedings Volume 6830, Advanced Sensor Systems and Applications III; 683011 (2007) https://doi.org/10.1117/12.754799
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

A novel Michelson interferometric fiber-optic hydrophone with a mechanical anti-aliasing acoustic filter, which consists of a two-hole cylindrical Helmholtz resonator, has been manufactured and tested. Experimental results show that this new fiber-optic hydrophone has a function of acoustic low-pass filtering. The low frequency sensitivity, as determined by the fiber interferometer and the sensing mandrel, is about -159dB re 1rad/μPa. The frequency response has a break point near 1200Hz and a measured roll-off of 50dB/octave. The fiber-optic hydrophone is a prototype device for a class of sensors that used to eliminate aliasing in the future sonar systems. To our knowledge, this is the first time that such a fiber-optic hydrophone has been reported.

Citation Download Citation

Zefeng Wang, Yongming Hu, Zhou Meng, Ming Ni, and Hong Luo "A fiber-optic hydrophone with an acoustic filter", Proc. SPIE 6830, Advanced Sensor Systems and Applications III, 683011 (26 November 2007); https://doi.org/10.1117/12.754799

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