光纤水听器解调技术研究进展

光纤水听器是水声研究领域的关键技术,在实际应用中具有显著优势,广泛应用于AUV导航定位、资源勘探、海水警戒等场景.光纤水听器将声信号转化为光信号传播,在接收信号时就需要对光信号进行解调提取出声压信号.总结了几种常用的信号解调算法及关键技术,包括PGC解调法、3×3耦合器解调法和外差解调法;介绍了各种解调算法的基本原理和...

A Review of Demodulation Technology of Fiber Optic Hydrophone

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.