摘要
通过数学推导和仿真分析,对直接调制光源产生相位载波的马赫-曾德尔(Mach Zehnder)干涉型光纤水听器调制解调技术进行了研究。提出了不能通过干涉信号的峰值或峰峰值检测来控制自动增益控制(AGC)电路增益的方法消除偏振衰落对输出信号的影响。在这一思想的指导下完成了光纤水听器相位载波(PGC)解调电路的设计,给出了实验测试结果。
The phase modulation and demodulation of interferometric Mach-Zehnder fiber-optic hydrophone using phase generated carrier (PGC) technique with direct source modulation is described and analyzed through mathematical calculation and simulation. It is found infeasible to overcome the polarization-induced fading influence on output signal through AGC circuit which uses peak or peak-peak signal of interferometric detection method to control the gain of AGC circuit. In this way, the PGC detection system design is completed and the experimental results are given out.
出处
《传感器技术》
CSCD
北大核心
2004年第2期14-17,20,共5页
Journal of Transducer Technology
关键词
干涉型光纤水听器
相位载波
解调技术
信号检测
系统仿真
interferometric fiber-optic hydrophone
phase generated carrier (PGC) homodyne demodulation technique
direct modulated laser source
polarization-induced fading
