光纤水听器阵列PGC高稳定性相位解调

High Stability PGC Phase Demodulation of Optical Fiber Hydrophone Arrays

相位生成载波(PGC)算法用于光纤水听器阵列解调时,载波初始相位φ_(0)和调制深度C值会受外界环境影响而发生变化,从而引起相位解调失真。通过引入自动延时校准模块保证φ_(0)值的稳定性;同时引入快速椭圆纠正模块实现一定范围内C值变化的动态抑制。通过上述模块的引入实现了光纤水听器阵列工程化应用中高稳定性相位解调。

The initial phase φ_(0) and modulation depth C values of the carrier will change due to the external environment when the phase generated carrier(PGC) algorithm is employed for fiber optic hydrophone array demodulation, resulting in phase demodulation distortion. This study introduces the automatic delay calibration module to guarantee the stability of the φ_(0) value. In order to achieve the dynamic suppression of C value change within a specific range, the rapid ellipse correction module is also introduced. The modules enable high stability phase demodulation in the engineering application of optical fiber hydrophone arrays.