光束传播法中有效折射率参数的确定方法及比较  

Methods of solving effective index in beam propagation method and their comparison

作　　者：温昌礼[1] 季家镕[1] 窦文华[1] 冯向华[1] 宋艳生[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410073

出　　处：《光电子．激光》2011年第3期478-481,共4页Journal of Optoelectronics·Laser

基　　金：国家"863"计划资助项目(2007AA01Z2a5)

摘　　要：针对光束传播法(BPM)应用中有效折射率neff如何获得其准确值的问题,本文给出了3种求解等效折射率的方法,从具有一定应用背景的多模脊形波导求解出发,利用3种方法分别求解了9个模式的等效折射率,并且将结果进行分析比较,给出了各自的应用范围。Nowadays,the beam propagation method（BPM） is applied to analyze the optical elements.Though many kinds of BPMs have been advanced,one of the important parameters n eff still needs a precise method to solve.In this paper,we presented three methods to solve n eff and took a deep research to find their characteristics and application areas.Based on an important application,we analyzed a multi-mode rib waveguide,and solved its 9 modes′ n eff.We got some important results about these three methods through comparing.For example,we point out the important application of finite element analysis in solving the Helmholtz equation in reverse and so on.

关 键 词：光学设计 有效折射率 有限元法 本征值 

分 类 号：TN256[电子电信—物理电子学]