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Proceedings Paper

Optical fiber hydrophone based on distributed acoustic sensing
Author(s): Yang Yang; Tuanwei Xu; Shengwen Feng; Jianfen Huang; Fang Li
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Paper Abstract

Based on the principle of phi-sensitive optical time domain reflectometry (φ-OTDR), the distributed optical fiber acoustic sensing (DAS) system can detect long distance and real-time acoustic signal by demodulating the phase change of backward Rayleigh scattering in the single mode fiber. Low sensitivity of single-mode fiber limits the underwater acoustic signal detection. In this paper, we design an elastic sensitizing layer base element encapsulation structure, and establish a theoretical analysis model. The theoretical analysis and experiment are carried out, the sensitivity of the acoustic pressure sensitivity of the elastic sensitizing layer structure is -141.6dB re 1rad/μPa, which is in good agreement with the theory.

Paper Details

Date Published: 12 December 2018
PDF: 5 pages
Proc. SPIE 10849, Fiber Optic Sensing and Optical Communication, 108490B (12 December 2018); doi: 10.1117/12.2503842
Show Author Affiliations
Yang Yang, Hunan Univ. (China)
Tuanwei Xu, Institute of Semiconductors (China)
Univ. of Chinese Academy of Sciences (China)
Shengwen Feng, Institute of Semiconductors (China)
Univ. of Chinese Academy of Sciences (China)
Jianfen Huang, Institute of Semiconductors (China)
Univ. of Chinese Academy of Sciences (China)
Fang Li, Institute of Semiconductors (China)
Univ. of Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 10849:
Fiber Optic Sensing and Optical Communication
Jie Zhang; Songnian Fu; Qunbi Zhuge; Ming Tang; Tuan Guo, Editor(s)

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