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10 October 2020 Measurement research of the optical fiber vector hydrophone used in underwater acoustic applications in the deep ocean
Yan Liang, Zhou Meng, Yu Chen, Jianfei Wang, Mo Chen
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Proceedings Volume 11554, Advanced Sensor Systems and Applications X; 115541P (2020) https://doi.org/10.1117/12.2576134
Event: SPIE/COS Photonics Asia, 2020, Online Only
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Abstract
This paper reports a resonant type optical fiber vector hydrophone (OFVH) for deep-sea applications, which is composed of a three-component optical fiber accelerometer and an optical fiber pressure hydrophone. To meet the acoustic requirements in the deep-sea, the orthogonal and unitized structure of the three-component accelerometer is adopted to increase the sensitivity and the operating frequency band of the accelerometer. The results show that the acceleration sensitivity is about 40dB re rad/g and the pressure sensitivity is nearly -147 dB re rad/μPa. The fluctuations of the acceleration and pressure sensitivity are less than 1.5dB over the 10-2000Hz frequency range. The deep-sea trial verified its excellent acoustic detection performance. Both the direction-of-arrival (DOA) and range for distant ship is estimated. The DOA estimation error is no higher than 10° and the range estimation error is less than 10%. This OFVH has a wide application prospect in the deep-sea.
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Yan Liang, Zhou Meng, Yu Chen, Jianfei Wang, and Mo Chen "Measurement research of the optical fiber vector hydrophone used in underwater acoustic applications in the deep ocean", Proc. SPIE 11554, Advanced Sensor Systems and Applications X, 115541P (10 October 2020); https://doi.org/10.1117/12.2576134
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KEYWORDS
Optical fibers
Acoustics
Error analysis
Signal processing
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