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25 October 2016 An experimental sonobuoy system based on fiber optic vector hydrophone
Wen Liu, Jun Wang, Jing Zhu, Yanqun Wu, Lina Ma, Zhengliang Hu
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Proceedings Volume 10156, Hyperspectral Remote Sensing Applications and Environmental Monitoring and Safety Testing Technology; 1015608 (2016) https://doi.org/10.1117/12.2243955
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China
Abstract
A sonobuoy system based on a fiber optic vector hydrophone (FOVH) is demonstrated. Phase Generated Carrier– Arctangent (PGC-ATAN) demodulation algorithm was used to acquire real-time underwater acoustic signals. After the optimal design of the laser configuration, the background noise of the FOVH is -104.3dB re rad √ Hz at 1 kHz, with an acceleration sensitivity of 41.5dB re rad/g which allows the system detecting signals at DSS0. The theoretical derivation of FOVH directivity is proposed and the design criterion is discussed. The ratio of the minimum to the maximum amplitude of the FOVH directivity is -35dB by symmetrical structure design of the FOVH. A lake trial shows that the maximum detection range of the sonobuoy system is more than 15km for an acoustic signal of 210dB re μPa, and the bearing of a moving target can be estimated.
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Wen Liu, Jun Wang, Jing Zhu, Yanqun Wu, Lina Ma, and Zhengliang Hu "An experimental sonobuoy system based on fiber optic vector hydrophone", Proc. SPIE 10156, Hyperspectral Remote Sensing Applications and Environmental Monitoring and Safety Testing Technology, 1015608 (25 October 2016); https://doi.org/10.1117/12.2243955
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KEYWORDS
Fiber optics
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