30 November 2012 High performance four-element DFB fiber laser hydrophone array system
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Abstract
A high performance four-element DFB fiber laser hydrophone array system has been developed and tested. The system has the advantages of low noise floor (<10-6pm/√Hz @ 1 kHz) and wide bandwidth. Acoustic pressure sensitivity of DFB fiber laser hydrophone is 115±3dB re. Hz/Pa. Unbalanced Michelson interferometer and digital phase-generated carrier (PGC) demodulation are adopted to realize high resolution fiber laser wavelength shift demodulation. Four-element DFB fiber laser hydrophone array system performance is tested and its noise equivalent pressure (NEP) is below sea state zero (SS0). The theory analysis, design, development and test of the system are demonstrated in detail.
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Zhihui Sun, Li Min, Xiaolei Zhang , Jiasheng Ni , Haifeng Qi, Yingying Wang, Chang Wang, Jun Chang, Gangding Peng, "High performance four-element DFB fiber laser hydrophone array system", Proc. SPIE 8561, Advanced Sensor Systems and Applications V, 856107 (30 November 2012); doi: 10.1117/12.2001185; https://doi.org/10.1117/12.2001185
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