基于有机聚合物的M-Z波导设计  

Design of Mach-Zehnder Waveguide Based on Organic Polymers

作　　者：陈韬[1] 廖进昆[1] 陆荣国[1] 徐伟[1] 王春利[1] 

机构地区：[1]电子科技大学光电信息学院,四川成都610054

出　　处：《光学与光电技术》2011年第1期27-31,共5页Optics & Optoelectronic Technology

基　　金：国家自然科学基金重点项目(60736038);863项目(2007AA01Z269;2009AA03Z413);新世纪人才计划(NCET-06-0805)资助项目

摘　　要：M-Z光波导是有机聚合物电光调制器的重要结构单元。将有效折射率法与二维差分束传播法相结合,利用有效折射率法计算了聚合物脊形波导的横向折射率分布及有效折射率。由Maxwell方程出发,结合辐射透明边界条件,采用Crank-Nicholson差分格式,得出有限差分束传播法的计算格式。通过对M-Z型波导结构中TM模的传播及损耗特性进行理论分析,研究了以IPC-E(20wt%)/PSU作为芯层材料的脊形M-Z波导,并对其结构进行了优化设计,得到了较为满意的结构参数。Mach-Zehnder optical waveguide is an important component in electro-optic polymer modulators. Approach of EIM and 2D-BPM are combined in this paper, and using effective index method （EIM） to calculate the transverse refractive index distribution and the effective index of polymeric ridge waveguide. Then proceeding from the Maxwell equation, the basic computing scheme of the finite difference beam propagation method （FD-BPM） is obtained by utilizing the transparent boundary condition and the Crank-Nicholson difference scheme. The TM mode light wave propagation and loss characteristics of the M-Z waveguide are theoretically analyzed, particularly the M-Z waveguide using IPC E（20wt%）/PSU as it＇s core layer. The structure of waveguide is optimized, and satisfactory results are obtained with the method proposed.

关 键 词：电光聚合物 Mach-Zehnder光波导 TM模 有效折射率法 

分 类 号：TN252[电子电信—物理电子学]