基于Matlab仿真算法的光源空间相干性研究

发布时间：2018-03-10 05:24

本文选题：物理光学　切入点：空间相干性　出处：《激光与光电子学进展》2017年09期 　论文类型：期刊论文

【摘要】：以杨氏双缝实验为基础,探究了光源空间相干性对干涉的影响情况。首先将光源空间展宽问题等效为平行光照射具有宽度的双缝的问题,再将两缝近似为离散化的多个次光源点阵列,每相邻点间距非常微小。从光矢量叠加原理出发推导出一种算法,该算法以两缝中每一对次光源点作为干涉单元,分别求出各单元在每一个观测点处的干涉光强,再对所有单元的干涉光强线性叠加,算出观测点的总光强。最后利用Matlab模拟出不同缝宽下,单色平行光、高斯光谱、矩形光谱分别垂直照射双缝时的光强分布情况。通过模拟结果的对比发现,双缝展宽对条纹衬比度的影响远甚于光谱展宽。所提算法简化了计算过程,也极大地提高了程序运行速度。
[Abstract]:In Young's double slit experiments, explores the spatial coherence of the interference effects. Firstly, the equivalent light space for the widening of the double slit problem of parallel light having a width, and then the two joint approximation for the discretization of the plurality of light source array, each distance between adjacent points from the light is very small. The vector superposition principle to deduce an algorithm, the algorithm with two joints in each pair of time points as the light interference unit were calculated for each unit of interference intensity at each observation point, then the interference intensity of linear superposition of all units, calculate the total intensity values of test points. Finally, using Matlab simulation a different slit width, monochromatic parallel light, Gauss spectra, light intensity spectra. The vertical rectangular double slit the distribution. By the comparison of simulation results, the double slit broadening on the fringe contrast lining on far more than the calculated spectrum broadening. The method simplifies the calculation process and greatly improves the running speed of the program.

【作者单位】：昆明理工大学理学院;
【基金】：国家自然科学基金(61007061,61565010)
【分类号】：O436.1

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