A Review of Demodulation Technology of Fiber Optic Hydrophone
GUO Yin-jing1, 3, WANG Lei1, SU Ming-yue1, SONG Ya-qi1, LÜ Wen-hong2, 3*
1. College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, China
2. College of Transportation, Shandong University of Science and Technology, Qingdao 266590, China
3. Qingdao Intelligent Ocean Technology Co., Qingdao 266590, China
Abstract：Fiber-optic hydrophone is a key technology in underwater acoustic research and has significant advantages in practical application. It is widely used in AUV navigation and positioning, resource exploration, seawater warning and other scenarios. The optical fiber hydrophone transmits the sound signal into the light signal. The optical signal needs to be demodulated to extract the sound pressure signal when receiving the signal. Several common signal demodulation algorithms are summarized in this paper, including the PGC demodulation algorithm, 3×3 coupler demodulation algorithm and heterodyne demodulation algorithm. Then, the basic principles and improved technology of various demodulation algorithms are described with a summary and comparison of their advantages and disadvantages. Finally, the challenges that the demodulation technology of fiber optic hydrophone faces have been put forward.
郭银景，王 蕾，苏铭玥，宋亚琦，吕文红. 光纤水听器解调技术研究进展[J]. 光谱学与光谱分析, 2022, 42(04): 1017-1021.
GUO Yin-jing, WANG Lei, SU Ming-yue, SONG Ya-qi, LÜ Wen-hong. A Review of Demodulation Technology of Fiber Optic Hydrophone. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(04): 1017-1021.
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