激光技术2017，Vol.41Issue(1)：113-119,7.DOI:10.7510/jgjs.issn.1001-3806.2017.01.023
基于M-Z干涉的相干高斯光束远场干涉图样研究
Study of far-field interference pattern for coherent Gaussian beams based on Mach-Zehnder interferometer
摘要
Abstract
In order to make the quality of fringe spacing and fringe visibility of interference pattern to meet the strict demands of active coherent laser detecting system of far distance,the distribution characteristics of coherent Gaussian beams based on Mach-Zehnder interferometer were analyzed. Optical intensity distribution of coherent Gaussian beams was deduced. Then interference pattern of scanning coherent Gaussian beams was gotten. The expressions of optical path difference, fringe spacing and fringe visibility based on Mach-Zehnder interferometer were derived by physical optics theory. The influences of rotation angle of beam splitter, detection distance and scanning speed on distribution characteristics of coherent light of far distance were analyzed and simulated numerically. As a result, the quantitative relation of rotation angle of beam splitter, detection distance and scanning speed was found. The results show that the distribution of coherent light of far distance is mainly controlled by rotation angle of beam splitter, detecting distance and scanning speed etc. Rotation angle of beam splitter in the interferometer has the influence on both fringe spacing and fringe visibility. The conclusion is helpful to choose the rotation angle in the experiment. Fringe spacing and fringe visibility should be taken into consideration simultaneously and the rotation angle of beam splitter is adjusted. It's useful to make the fringe visibility as large as possible.关键词
物理光学/马赫-曾德尔干涉原理/主动相干探测/扫描相干高斯光束/远场干涉图样Key words
physics optics/Mach-Zehnder interferometer/active coherent detection/scanning coherent Gaussian beams/far-field interference pattern分类
数理科学引用本文复制引用
单聪淼,孙华燕,赵延仲..基于M-Z干涉的相干高斯光束远场干涉图样研究[J].激光技术,2017,41(1):113-119,7.基金项目
国家自然科学基金资助项目(61302183) （61302183）
