26 November 2007 A fiber-optic hydrophone with an acoustic filter
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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.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zefeng Wang, Zefeng Wang, Yongming Hu, Yongming Hu, Zhou Meng, Zhou Meng, Ming Ni, Ming Ni, Hong Luo, Hong Luo, } "A fiber-optic hydrophone with an acoustic filter", Proc. SPIE 6830, Advanced Sensor Systems and Applications III, 683011 (26 November 2007); doi: 10.1117/12.754799; https://doi.org/10.1117/12.754799

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