Scattering loss in optical waveguide with trapezoidal cross section  

作　　者：彭文强 吴宇列 刘勇 尹自强 

机构地区：[1]College of Mechatronics Engineering and Automation,National University of Defense Technology

出　　处：《Journal of Central South University》2012年第5期1317-1321,共5页中南大学学报（英文版）

基　　金：Project(50735007) supported by the National Natural Science Foundation of China;Project(2010ZX04001-151) supported by Important National Science & Technology Specific Program of China

摘　　要：To get the scattering loss of the trapezoidal core waveguide,a new analysis model is presented based on the perturbation equivalent method and modified effective-index method.Firstly,the trapezoidal core waveguide is successfully equivalent to the rectangular one with both restricting the same optical field energy by adopting the perturbation method,Then,the equivalent rectangular core waveguide is decomposed into two slab waveguides by employing the modified effective-index method,The trapezoidal core waveguide scattering theory model is established based on the slab waveguide scattering theory.With the sidewalls surface roughness in the range from 0 to 100 nm in the single model trapezodial core waveguide,optical simulation shows excellent agreement with the results from the scattering loss model presented.The relationship between the dimension and side-wall roughness with the scattering loss can be determined in the trapezoidal core waveguide by the scattering loss model.To get the scattering loss of the trapezoidal core waveguide, a new analysis model is presented based on the perturbation equivalent method and modified effective-index method. Firstly, the trapezoidal core waveguide is successfully equivalent to the rectangular one with both restricting the same optical field energy by adopting the perturbation method. Then, the equivalent rectangular core waveguide is decomposed into two slab waveguides by employing the modified effective-index method. The trapezoidal core waveguide scattering theory model is established based on the slab waveguide scattering theory. With the sidewalls surface roughness in the range from 0 to 100 nm in the single model trapezodial core waveguide, optical simulation shows excellent agreement with the results from the scattering loss model presented. The relationship between the dimension and side-wall roughness with the scattering loss can be determined in the trapezoidal core waveguide by the scattering loss model.

关 键 词：trapezoidal core waveguide perturbation equivalent method modified effective-index method scattering loss 

分 类 号：TN252[电子电信—物理电子学]