光学精密工程2025，Vol.33Issue(10)：1550-1557,8.DOI:10.37188/OPE.20253310.1550
用于深海环境的光纤水听器基元设计与测试
Design and test of fiber optic hydrophone element for deep-sea application
摘要
Abstract
In order to improve the acoustic sensitivity of a fiber optic hydrophone in a deep-sea environ-ment,a deep-sea fiber optic hydrophone element based on a push-pull mandrel structure was designed.It could effectively detect target underwater acoustic signals of 10 Hz-2 kHz at 3 000 meters in the deep sea.First,based on the Michelson interferometer,the composition and acoustic sensitivity of the fiber optic hy-drophone with a push-pull mandrel structure were introduced.Then,the acoustic pressure conversion mechanism was analyzed using elastic mechanics theory.Afterward,the influence of the elastic tube struc-tural parameters of the hydrophone primitives on acoustic sensitivity was simulated via the finite element method.Meanwhile,the working stability under deep-sea conditions was explored.According to the cal-culation results,five groups of fiber optic hydrophone elements with different structures and manufacturing processes were fabricated.Finally,the working performance of the five groups of fiber optic hydrophones at 3 000 meters deep-sea was tested using a high hydrostatic pressure acoustic sensitivity system to verify the influence of structural parameters and manufacturing processes on acoustic sensitivity in a deep-sea en-vironment.The experimental results show that the structure parameters and fabrication process of fiber op-tic hydrophone can significantly affect its working performance and stability in deep-sea environment.Af-ter optimization,the fiber optic hydrophone's response of underwater acoustic signal in 10 Hz-2 kHz fre-quency band at 3 000 meters deep-sea can reach-127 dB re rad/μPa,which is 7 dB re rad/μPa higher than before.It basically meets the requirements of high sensitivity and reliable detection of sound waves for deep-sea application.关键词
光纤水听器/推挽式结构/声波灵敏度/深水耐压测试Key words
fiber optic hydrophone/push-pull mandrel structure/pressure acoustic sensitivity/hydrostat-ic pressure test分类
机械制造引用本文复制引用
孙晓园,光东,邓草原,俞本立..用于深海环境的光纤水听器基元设计与测试[J].光学精密工程,2025,33(10):1550-1557,8.基金项目
安徽省重点研究与开发计划基础领域项目(No.2023z04020012) （No.2023z04020012）
