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.
出处
《中国激光》
EI
CAS
CSCD
北大核心
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
