Abstract:
Laser interferometry technique provides an alternative way for measurement of underwater acoustic, which is different from the traditional way using a hydrophone. This paper presents a review of the applications in underwater acoustic measurement using laser interferometry, including hydrophone calibration, acoustic distribution measurement, and measurement of transducer surface velocity. The current research progress are summarized and analyzed. The measurement theories of the above three techniques are introduced and some representative results are given, the constraints of each technique and the key problems to be solved are analyzed, and the future research and development directions are predicted. Although laser interferometry is not yet a complete replacement for traditional underwater acoustic measurement, it is expected that the advantages of laser interferometry will be better utilized and the level of underwater acoustic measurements will be improved after continued research and development.