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基于BPM的渐变折射率波导分析

发表时间:2010-02-15  浏览量:1575  下载量:499
全部作者: 吴永烽,喻洪麟,马升涛
作者单位: 重庆大学光电技术及系统教育部重点实验室;西南大学工程技术学院
摘 要: 在前期基于微电子机械系统(micro electro�mechanical systems, MEMS)闪耀光栅波分复用器(wavelength division multiplexer, WDM)的研究基础上,需要对该系统中的渐变折射率波导进行分析,以便进一步分析该波分复用系统的性能。详细推导了光束传播法(beam propagation method,BPM)的微分方程,并给出了BPM微分方程的有限差分解形式。利用图形化编程软件LabVIEW实现FDBPM(finite difference beam propagation method),并对已知折射率分布的径向渐变折射率波导进行仿真分析,其结果表明:在高斯光束垂直入射情况下,该波导中具有稳定的高斯分布光场,其束腰半径呈周期变化,并且得出该波导的自聚焦焦距为22 μm.
关 键 词: 物理光学;渐变折射率波导;束传播方法;高斯光束;LabVIEW
Title: Analysis on gradient refractive index waveguides based on BPM
Author: WU Yongfeng, YU Honglin, MA Shengtao
Organization: Key Laboratory of Opto�Electronic Technology and System, Ministry of Education;School of Engineering and Technology, Southwest University
Abstract: Gradient refractive index waveguides need to be analyzed, and accordingly study the performance of wavelength division multiplexer (WDM) based on micro electro�mechanical systems (MEMS) blazed grating, such is included gradient index waveguides in structure and studied previously. The BPM (beam propagation method) differential equation is deduced in detail, at the same time, its finite difference solution is put forward. According to the solution, the finite difference beam propagation method (FDBPM) algorithm is carried out with laboratory virtual instrument engineering workbench (LabVIEW), one of the graphical programming software. And radial gradient refractive index waveguides whose refractive index profile is offered are simulated and analyzed. The results indicate that there has stable Gaussian distribution light field in the waveguides when the vertical incident light beam is Gaussian beam, and the radius of waist is periodic changed. And the results show that the self�focusing focal length of the waveguide is 22 μm.
Key words: physical optics; gradient refractive index waveguides; beam propagation method; Gaussian beam; LabVIEW
发表期数: 2010年2月第3期
引用格式: 吴永烽,喻洪麟,马升涛. 基于BPM的渐变折射率波导分析[J]. 中国科技论文在线精品论文,2010,3(3):219-224.
 
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