Optimization design of the pressure phase sensitivity of the fiber-optic air-backed mandrel hydrophone

Pressure phase sensitivity is one of the most important performance indexes of the fiber-optic hydrophone. Maximizing the pressure phase sensitivity is a basic principle in the fiber-optic hydrophone design. In this work, the orthogonal experimental method has been used to optimize the design of the pressure phase sensitivity of the fiber-optic air-backed mandrel hydrophone. A general three-dimensional theoretical model is carried out, and nine fiber-optic hydrophones are fabricated for orthogonal experiment. Several factors which affect the sensitivity are analyzed in the experiments, and the results validate the theory. The optimized designs are also gained by the analysis of the results to maximize the pressure phase sensitivity.