渐变型声指向耦合器中声场的计算  

Numerical Analysis of Acoustical Field on Tapered Acoustical Directional Coupler

作　　者：范国芳[1] 杨吉生[1] 朱剑平[1] 朱月红[1] 孙长库[1] 

机构地区：[1]天津大学理学院物理系,天津300072

出　　处：《光电子．激光》2003年第11期1237-1239,共3页Journal of Optoelectronics·Laser

基　　金：天津大学教育振兴行动计划资助项目

摘　　要：提出一种新的计算波导中场分布的方法。该方法基于有限元法(FEM),但采用人工透射边界,称之为有限元 人工透射边界法。并用渐变型声指向耦合器中表面声波导二维声场的计算实例说明该方法的实用性。A new approach to calculate the waveguide field which is called as finite element artificial transmitting boundary method,was presented based on the finite element method and artificial transmitting boundary.Numerical examples showed it is suitable for the 2D acoustical field on the substrate region of acousticoptical tunable filter with tapered acoustical directional coupler.

关 键 词：波导 有限元法 人工透射边界 渐变型声指向耦合器 二维声场 

分 类 号：TN622[电子电信—电路与系统]