评价光纤水听器探头的性能参数

Performance parameters for appraising the head of fiber optic hydrophone

光纤水听器声学性能的准确评价一直是人们非常关心的问题。简要叙述了相位干涉型光纤水听器的工作原理,指出了光纤水听器探头和光纤水听器系统的区别。作为光纤水听器的关键技术之一,光纤水听器探头声学性能的测试还没有明确的规范或标准。为此,提出了有关评价光纤水听器探头声学性能的参数,如相移灵敏度、加速度相移灵敏度、相对加速度相移灵敏度、指向性、相移灵敏度随静水压的变化、相移灵敏度随温度的变化等的定义,并给出了相关的表达式,对准确测量和评价光纤水听器探头的声学性能有一定的借鉴意义。并希望通过这样的讨论,促进光纤水听器探头性能测试的规范和相关标准的制定。

Accurately evaluating the acoustic performances of optic fiber hydrophone had been highly concerned.This paper briefly described the principle of interferometric fiber optic hydrophone,and pointed out the differences between the head and the system of optic fiber hydrophone.As one of the key technologies of optic fiber hydrophone,there is no clear norm or standard for testing the head of optic fiber hydrophone.So,some definitions and related expressions of basic parameters for appraising the acoustic performances of the head of fiber optic hydrophone were presented here,including phase-shifted sensitivity,acceleration phase-shifted sensitivity,relative acceleration phase-shifted sensitivity,directivity,phase-shifted sensitivity with the changing of hydrostatic pressure,phase-shifted sensitivity with the changing of temperature,etc.This helps to rightly measure and appraise the acoustic performances of the head of fiber optic hydrophone,and we hopes that by such discussion,promotes the drawing up of the testing norm or standard of the head of optic fiber hydrophone.