Sea trial of flow noise of fiber laser hydrophone array

Ge-yang Hao; Qi Li; Bo Liu; Wei Liu; Guo-jun Wu

doi:10.1117/12.2505565

12 December 2018 Sea trial of flow noise of fiber laser hydrophone array

Ge-yang Hao, Qi Li, Bo Liu, Wei Liu, Guo-jun Wu

Proceedings Volume 10844, Advanced Laser Technology and Applications; 108440Z (2018) https://doi.org/10.1117/12.2505565
Event: International Symposium on Optoelectronic Technology and Application 2018, 2018, Beijing, China

Abstract

Towed linear array array based on fiber laser hydrophone which had much research potentiality owing to its higher acoustic pressure sensitivity, smaller size and lower difficulty of multiplexing. Flow noise is one of the main sources of noise in the towed linear array system. It will compress the dynamic range of fiber laser hydrophone and reduce the detection ability to small signal. In this paper, the structure of a 4 channel fiber laser hydrophone towed linear array was presented, and the data of sea trial of flow noise was analyzed. The results shows that the influence of flow noise mainly concentrate on the low frequency band which under 500Hz, and the background noise level has increased nearly 70-80dB when the array is towed at the speed of 3 kn.

Citation Download Citation

Ge-yang Hao, Qi Li, Bo Liu, Wei Liu, and Guo-jun Wu "Sea trial of flow noise of fiber laser hydrophone array", Proc. SPIE 10844, Advanced Laser Technology and Applications, 108440Z (12 December 2018); https://doi.org/10.1117/12.2505565

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