Optimization design for polymeric S-shaped ridge waveguide  

作　　者：LU RongGuo LIAO JinKun TANG XiongGui LI HePing LIU YongZhi 

机构地区：[1]School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China

出　　处：《Chinese Science Bulletin》2010年第17期1834-1839,共6页

基　　金：supported by Advance Research Program of Weapon Equipment, National Natural Science foundation of China (60736038);National Hi-Tech Research and Development Program of China (2007A A01Z269)

摘　　要：The dispersion characteristics and transverse field distribution of the fundamental and higher order modes are analyzed for polymeric ridge multimode waveguide by a new technique which is based on the combination of the effective index method and the variational method. An algorithm is implemented to study the effect of the structure parameters and dimensions on the dispersion curves. The optical field distribution of the fundamental and higher order modes for TM modes are computed. The single mode conditions of polymeric ridge waveguide are obtained. The relationship between the curvature radius and the bending loss of S-shaped ridge waveguide are studied with wide-angle finite-difference beam propagation method and effective index method. The conclusion is: when the curvature radius is larger than 5000 μm, the bending loss will not decrease distinctly even if the curvature radius increases, and the light can propagate stably in the S-shaped ridge waveguide.The dispersion characteristics and transverse field distribution of the fundamental and higher order modes are analyzed for polymeric ridge multimode waveguide by a new technique which is based on the combination of the effective index method and the variational method. An algorithm is implemented to study the effect of the structure parameters and dimensions on the dispersion curves. The optical field distribution of the fundamental and higher order modes for TM modes are computed. The single mode conditions of polymeric ridge waveguide are obtained. The relationship between the curvature radius and the bending loss of S-shaped ridge waveguide are studied with wide-angle finite-difference beam propagation method and effective index method. The conclusion is： when the curvature radius is larger than 5000/.tin, the bending loss will not decrease distinctly even if the curvature radius increases, and the light can propagate stably in the S-shaped ridge waveguide.

关 键 词：脊波导 聚合物 S形 优化设计 有限差分光束传播法 曲率半径 弯曲损耗 有效折射率 

分 类 号：TN252[电子电信—物理电子学]