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提出了用法布里-珀罗(F-P)型光纤加速度计构成同振式矢量水听器的方案,并进行了结构设计。通过对水听器光学输出解调算法的理论分析,采取双探头接收光强差值的倒数输出设计,从而实现了针对法F-P型多光束干涉的相位产生载波(PGC)解调方案。推导了F-P型光纤加速度计的加速度相移灵敏度的表达式,用计算机仿真了F-P干涉的PGC解调过程,并对系统输入输出信号的进行对比,验证了解调方法的可行性,拓宽了PGC解调的应用范围。分析了光强及C值选择对解调的影响,并采用模拟输入F-P信号的方式,进行DSP模拟解调验证,证明了F-P同振式光纤矢量水听器PGC解调算法的可行性。
Proposed the Fabry-Perot (F-P) -type optical fiber accelerometer resonant vibration vector hydrophone program, and the structural design. Through the theoretical analysis of the hydrophone optical output demodulation algorithm, the reciprocal output design of the received light intensity difference of the dual-probe is adopted, and the phase-generating carrier (PGC) demodulation scheme for the F-P multi-beam interference is realized. The expression of acceleration phase shift sensitivity of FP optical fiber accelerometer was deduced. The PGC demodulation process of FP interference was simulated by computer, and the input and output signals of the system were compared to verify the feasibility of demodulation method and broaden the PGC solution Adjust the scope of application. The influence of light intensity and C value selection on demodulation was analyzed. The analog input F-P signal was used to verify the feasibility of DSP demodulation. The feasibility of PGC demodulation algorithm for F-P fiber-optic hydrophone was also demonstrated.