一种测量激光光强按角度分布的新方法  

A New Measurement of Light Intensity Distribution with Divergence

作　　者：宋小鹿[1] 李兵斌[1] 王石语[1] 蔡德芳[1] 文建国[1] 过振[1] 

机构地区：[1]西安电子科技大学技术物理学院,陕西西安710071

出　　处：《半导体光电》2007年第4期572-575,共4页Semiconductor Optoelectronics

摘　　要：提出了一种新的测量方法,用于测量近似点光源或线光源在相同半径处光强按角度的分布。测量系统由旋转装置、角度探测系统和光强探测系统三部分组成。利用该系统对多模光纤耦合激光器光强分布进行了实际测量。结果表明,采用高斯光束形式可以较好地描述该光束光强的远场分布,由拟合曲线得出的光强按角度分布规律与实验所用光纤数值孔径相符,进一步说明了该实验方法的可信性与可靠性。In order to obtain the experiment information of light intensity distribution with divergence,a new measurement is introduced. The system is composed of three parts, rotary device,angle detector,and optical intensity detector. In the experiment,this method was used to draw the curve of the intensity distribution of transmitted beam of multimode optical fiber. The experimental result show that the Gaussian beam can be used to well describe the light intensity distribution, moreover, numerical aperture （NA） of fiber can be obtained directly from the figure, which prove that this method is reliable and credible.

关 键 词：光强分布 多模光纤耦合激光器 数值孔径 

分 类 号：TN247[电子电信—物理电子学]