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.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
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)
关键词
光学设计
有效折射率
有限元法
本征值
optical design
effective index
finite element analysis
characteristic value
