Performance parameters for appraising the head of fiber optic hydrophone

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.