【摘要】 该文概述了Mach-Zehnder干涉型光纤水听器两种相位载波调制(PGC)原理,着重分析直接调制半导体激光器的相位载波的信号解调,及在解调技术中伴生调幅的影响及解决办法,并根据直接调制光源的PGC零差检测方案电路系统,仿真搭建了Matlab的Simulink系统,通过改变载波频率、被测信号频率与被测信号幅度,用大量的Matlab仿真图形分析指出,直接调制光源实现相位载波技术中,载波频率、被测信号频率与被测信号幅度对系统解调输出结果的影响,实践证明该结果对水听器组阵具有很好的理论指导作用。更多还原

【Abstract】 This paper describes two different phase modulation principles of fiber optic hydrophone, and mainly analyzes the additional influence of amplitude modulation in the demodulation scheme for direct diode laser source modulation, and provides the resolution. By means of the electric circuit system of PGC, Matlab and Simulink are established . By changing the frequency of a phase , and the range and frequency of a measured signal ,we can point out through a number of Matlab imitation figures, an influence can be caused by these three things we mentioned above, and we can also tell what the influence will be by using phase technique which is carried out by direct source modulation .Practice proved this result has good guiding function on fiber optic hydrophone.更多还原