Matlab移相干涉术测量光纤连接器端面的曲率半径
时间:2019-12-08 15:12 来源:毕业论文 作者:毕业论文 点击:次
摘要: 光纤连接器是一种重要的光无源器件。连接器端面有三个重要参数,它们直接影响着连接器整体的性能,从而影响光传输系统的可靠性和光学性能。曲率半径(ROC)便是其中的影响参量之一。本文在阐述移相干涉术基本原理的基础上,论述了基于移相干涉术测量该曲率半径的原理算法。实验时利用 6JA 型干涉显微镜,通过移相记录了三组干涉图,并基于曲率半径的测量算法编写了 Matlab 处理程序,最终求得半径为 13.6mm,表明:被测连接器端面的曲率半径符合国际电工委员会的标准。 42531 毕业论文关键词 移相干涉术 光纤连接器 干涉显微镜 曲率半径 Title Measurement of the Curvature Radius of an Optical Fiber Connector End Face Based on Phase- shifting Interferometry Abstract Optical fiber connectors are one type of important optical passive devices. There are three important parameters for a fiber optic connector end face which directly influence the total performance of the connector and sequentially affect the reliability and optical property of the optical transmission system. Radius of curvature is one of these parameters. Based on the elaboration of the fundamental principle of phase-shifting interferometry, this dissertation discusses the corresponding algorithm of the technique for measuring of the radius of curvature of the end-face. In the experiment, with the help of 6JA interference microscope, three groups of phase-shift interferograms were recorded according to the technique and a Matlab program was written and used for processing the interferograms. Eventually, ROS was calculated as 13.6mm. This indicates that the radius of the connector end-face meets the criterion of IEC. Keywords phase shifting interferometry optical fiber connector interference microscope radius of curvature. 目次 1引言..1 1.1光纤连接器简述..1 1.2曲率半径的基本测量方法2 1.2.1牛顿环法..2 1.2.2球径仪法..3 1.2.3自准直法..4 1.2.4激光球面干涉仪法4 1.3本文采用的方法及所做的工作.5 2移相干涉术测量曲率半径的基本原理.6 2.1移相干涉术的基本原理..6 2.2基于移相干涉术测量曲率半径的算法原理.6 3实验装置、工作原理及调节步骤.10 3.1实验装置及工作原理10 3.2调节步骤.11 4实验数据与编程处理.13 4.1实验数据..13 4.2算法程序与处理结果.14 4.3结果分析.16 结论.18 致谢.19 参考文献20
1 引言 当前,随着通信事业的飞速发展,光纤通信技术已步入实用化阶段,在各大领域中得到广泛的使用[1]。光纤连接器是光跳线的关键器件,因此也随着光纤技术的提高而发展。光通信中需要大量的光纤连接器,就经济性而言需要其具有高性能、低成本、小型化等特点[2,3]。光纤连接器端面有三个重要参数,分别为光纤高度、顶点偏移以及曲率半径[4],它们影响着连接器的光学性能(主要是插入损耗和回波损耗这两个最基本的参数指标)[5-7]。按照国际电工委员会的标准,球形连接器端面的曲率半径应在 10-25mm 范围内。由此,对于曲面半径的测量显得非常重要。 |