Research of the Ultra-Thin Fiber Bragg Grating Hydrophone

In this paper, the basic theories and characteristics of distributed Bragg reflection (DBR) fiber laser and distributed feedback (DFB) fiber laser as hydrophone were described and analyzed; The interferometric demodulation technique of the underwater acoustic signals from fiber Bragg grating (FBG) hydrophone was discussed; And the theoretical experimental conclusions of the ultra-thin fiber Bragg grating hydrophone were introduced; Finally, the application in the torpedo homing field of the research on the ultra-thin fiber Bragg grating hydrophone were prospected.