基于基频混频的相位生成载波调制解调方法研究  

A PGC demodulation method based on the fundamental frequency mixing

作　　者：李阳[1,2] 苏晓星[1] 刘艳[1] 刘志波[1] 马林[1] 宁提纲[1] 简水生[1] 

机构地区：[1]北京交通大学全光网络与现代通信网教育部重点实验室,北京100044 [2]北京交通大学光波技术研究所,北京100044

出　　处：《光电子．激光》2012年第5期933-938,共6页Journal of Optoelectronics·Laser

基　　金：国家"973"计划(2010CB328206);国家自然科学基金(60837002)资助项目

摘　　要：提出了干涉型光纤传感器的相位生成载波(PGC)解调的一种改进方法。在传感信号的幅度较小的情况下,该解调方法只由基频信号对输入信号混频,就可以得到与原始传感信号波形成正比的信号,从而提高整个解调过程的效率。仿真分析及实验结果都验证了改进算法的可行性。在基于马赫-曾德尔干涉仪(MZI)以及外调制方式的信号检测实验中,采用该解调方法所得信号和原信号相关系数达0.99以上。An improved algorithm of phase generated carrier（PGC） demodulation for optical fiber interferometer sensors is proposed.When the amplitude of the phase disturbance is relatively small,the phase demodulation with this algorithm can be accomplished with the fundamental frequency mixing only,yielding a signal waveform proportional to the original one.Thus the efficiency of the whole demodulation process can be improved.The simulation and experimental results verify the feasibility of the proposed algorithm.In the signal detection experiment based on Mach-Zehnder interferometer（MZI） with the external modulation,the correlation coefficient between the demodulated signal and the original one is greater than 0.99.

关 键 词：相位生成载波(PGC) 相位解调 光纤干涉仪 

分 类 号：TN29[电子电信—物理电子学]