光反馈干涉系统反馈水平因子的实时测量算法  

Real-time measurement algorithm of feedback strength factor of optical feedback interferometry systems

作　　者：赵闻[1] 叶会英[1] 禹延光[1] 汪灵[1] 

机构地区：[1]郑州大学信息工程学院,河南郑州450001

出　　处：《激光与红外》2012年第6期638-641,共4页Laser & Infrared

基　　金：国家自然科学基金项目(No.60871031)资助

摘　　要：基于Lang-Kobayashi方程研究了光反馈干涉信号的特征点,利用这些特征点采用相位解卷方法得出了重构光反馈相位(F用表示)的计算公式,并仿真验证了该方法,结果表明该方法重构F的剩余误差精度为10-9rad。在此基础上研究了无光反馈时系统的光相位(0用表示)与光反馈水平因子之间的关系,当预置的光反馈水平因子的大小越接近实际的光反馈水平程度时,0的一次微分信号幅值就越小,进而设计了光反馈水平因子的实时测量算法。最后在三种光反馈强度下通过仿真验证该算法,结果表明用该算法测量得到的反馈水平因子精确度可达到98.77%。Feature points of the optical feedback interference signal are analyzed based on the Lang-Kobayashi equa- tion. Reconstruction method of the light phase with external optical feedback （ denoted by φF ） is presented based on phase unwrapping, The proposed approach has been verified by numerical simulations. The results indicate that the re- sidual error is 10^-9 rod by applying this method to reconstruct φF. Based on the above researches,the relationship be- tween the light phase without external optical feedback（ denoted by φ0 ）and the feedback strength factor（ denoted by C） has been studied. It finds that the closer the preset C is to the true value of C,φ0the smaller the magnitude of the differential signal of the will be. That helps to design the real-time measurement algorithm of C. Finally, computer sim- ulations have also been carried out to verify the proposed algorithm under three different feedback levels, showing that C can be determined with an accuracy of 98.77%.

关 键 词：光反馈干涉 光反馈水平因子 相位解卷 

分 类 号：TN248.4[电子电信—物理电子学]