中国激光, 2002, 29 (5): 411, 网络出版: 2006-08-08
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
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-14 dB,-3 dB带宽为2.0 nm.
Abstract
In this paper, 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 LiNbO 3. Experimental measurement shows that sidelobes are suppressed to -14 dB and -3 dB bandwidth is 2.0 nm.
张胜甲, 胡鸿璋, 刘威, 耿凡. 集成光学声光可调谐滤波器中的权重切趾[J]. 中国激光, 2002, 29(5): 411. 张胜甲, 胡鸿璋, 刘威, 耿凡. Weighted Apodization in Integrated Optical Acousto-optic Tunable Filter[J]. Chinese Journal of Lasers, 2002, 29(5): 411.
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