一种基于3×3耦合器的光纤相位解调算法  

Optical fiber phase demodulation algorithm based on 3×3 coupler

作　　者：宋美杰 于廷宽 SONG Meijie;YU Tingkuan(College of Electronic Information and Automation,Guilin University of Aerospace Technology,Guilin Guangxi 541004,China;The 34th Research Institute of CETC,Guilin Guangxi 541004,China)

机构地区：[1]桂林航天工业学院电子信息与自动化学院,广西桂林541004 [2]中国电子科技集团公司第三十四研究所,广西桂林541004

出　　处：《光通信技术》2019年第5期51-53,共3页Optical Communication Technology

摘　　要：针对当前3×3耦合器相位解调算法的不足,借鉴相位生成载波(PGC)解调算法,提出了一种新的3×3耦合器相位解调算法。该算法通过在干涉仪中加一个高频大幅相位调制信号,使用3×3耦合器中2路输出的一阶倍频项实现相位解调,对该算法进行了理论推导,并通过Matlab编程对算法进行了验证。该方法避免了传统3×3耦合器法被动解调中无法实时判断干涉效果、不能及时进行偏振控制的不足。In view of the shortcomings of the current phase demodulation algorithm of 3×3 coupler, a new phase demodulation algorithm of 3×3 coupler is proposed by referring to the phase generation carrier(PGC) phase demodulation algorithm. Which uses a high frequency and large phase modulation signal in the interferometer, and uses the first-order doubling term of the two outputs in the 3×3 coupler. The algorithm is theoretically deduced and verified by Matlab programming. The method avoids shortcomings of the traditional 3×3 coupler method passive demodulation, which cannot judge the interference effect in real time, and cannot perform the polarization control in time.

关 键 词：光纤干涉仪 相位解调 3×3耦合器 

分 类 号：TN622[电子电信—电路与系统]