激光频移反馈成像的数值仿真研究  

Numerical simulation of laser frequency-shifted feedback imaging

作　　者：凌进中[1] 马军山[1] 许炯[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光学仪器》2010年第4期38-42,共5页Optical Instruments

基　　金：上海市教委科研创新基金资助项目(09YZ223);上海市研究生创新基金资助项目(JWCXSL0802)

摘　　要：激光频移反馈法利用了激光器的动态特性和外差测量的原理,能极大地提高共聚焦显微系统对光反馈的灵敏度,因此可以广泛地应用于对高吸收,高散射介质中目标的成像。阐述了激光频移反馈成像的基本原理,并对该理论进行了仿真研究,分析了不同的反馈光频移、光反馈系数和不同激光器以及寄生反射对实验结果可能产生的影响。结果证实了在极弱反馈光环境下对目标成像的可行性,极大地提高共聚焦系统对反馈光的灵敏度。To image the object immerged in high absorption, high-scattering solution, optical heterodyne interferometry and the dynamic properties of lasers has been used to improve the sensitivity to the optical feedback in confocal system. The theory of laser frequency-shifted feedback imaging has been introduced and digitally simulated with the different optical frequency shifts, different optical feedback coefficients, different types of lasers, and the disadvantage of parasitic reflectivity also been considered. The result confirmed the feasibility of this scheme to image with extremely weak optical feedback, which greatly improved the optical sensitivity of confocal imaging system.

关 键 词：激光测量 激光频移反馈 Lang -Kobayashi方程 寄生反射 

分 类 号：O43[机械工程—光学工程]