集成光学声光可调谐滤波器中的权重切趾  

Weighted Apodization in Integrated Optical Acousto-optic Tunable Filter

作　　者：张胜甲 胡鸿璋[1] 刘威[1] 耿凡[2] 

机构地区：[1]天津大学理学院应用物理系,天津300072 [2]中国航天机电工业总公司8358所,天津300192

出　　处：《中国激光》2002年第5期411-414,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金 (批准号 :10 0 84 0 0 1)资助项目

摘　　要：理论分析了权重耦合的声指向耦合器的原理及其在滤波器切趾中的应用 ,并且根据理论设计了声波导的方案 ,分析了应用这种声波导的滤波器的转换特性。在X切Y传的LiNbO3基底上实际制作了这种滤波器。实验测定表明 ,侧瓣被抑制到 - 14dB ,- 3dB带宽为 2 0nm。The principle of weighted directional coupler and its application in apodization of integrated acousto-optic tunable filter (IAOTF) have been analyzed and discussed. According to the theoretical analysis, the acoustic waveguide has been designed and the TE/TM mode conversion characteristics of AOTF have been analyzed. Based on the results, practical filter has been fabricated on the substrate of X-cut, Y-propagate LiNbO3. Experimental measurement shows that side-lobes are suppressed to -14 dB and -3 dB bandwidth is 2.0 nm.

关 键 词：集成光学 声光可调谐滤波器 权重切趾 

分 类 号：TN713[电子电信—电路与系统]