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A low frequency denoising algorithm of optical fiber laser hydrophone based on wavelet transformation
Yang, Yahan1; Hao, Geyang2; Liu, Bo2; Wu, Guojun1,2; Lv, Pei1
Conference NameInternational Symposium on Optoelectronic Technology and Application 2018: Ocean Optics and Information Technology, OTA 2018
Source PublicationOcean Optics and Information Technology
Conference Date2018-05-22
Conference PlaceBeijing, China
Contribution Rank2

Optical fiber laser hydrophone which has more research potentiality and value owing to higher acoustic pressure sensitivity, smaller size and lower difficulty of multiplexing. However the detecting capacity to low frequency signal of optical fiber laser hydrophone will be limited because of the low frequency noise such as 1/f noise and thermal noise of optical fiber laser and pumped laser. In order to suppress these noises, the iterative discrete wavelet transformation algorithm was designed which used multi-scale trait of wavelet transform. The different spectral components of underwater acoustic signal were separated and the noises below 1kHz were eliminated on the basis of the target signal amplitude would not be weakened. The measured data acquisitive from anechoic tank showed that the algorithm reduced the noise below 1kHz nearly 50dB and the Signal to Noise Ratio(SNR) is improved from 55.23dB to 84.05dB. © 2018 SPIE.

Indexed ByEI
EI Accession Number20185206315936
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Document Type会议论文
Affiliation1.Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, Shandong; 266235, China;
2.Xian Institute of Optics and Precision Mechanics of CAS, Xian, Shanxi; 710119, China
Recommended Citation
GB/T 7714
Yang, Yahan,Hao, Geyang,Liu, Bo,et al. A low frequency denoising algorithm of optical fiber laser hydrophone based on wavelet transformation[C]:SPIE,2018.
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