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3级串联声光可调谐滤波器旁瓣抑制的研究 被引量:1

Suppression of sidelobe levels for acousto-optic tunable filters using cascaded three single-stage AOTFs
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摘要 利用3级滤波结构,实现了对声光可调谐滤波器(AOTF)的旁瓣抑制。根据耦合模理论分析了共线型和准共线型AOTF的滤波原理,推导出3级级联滤波的转换特性表达式:计算结果表明,3级滤波结构能够有效地抑制旁瓣。实验测定表明,旁瓣被抑制到-27dB左右,并且滤波带宽也得到了压窄。 The large sidelobes higher than -9 dB of the single-stage acousto-optic tunable filter(AOTF) may limit the application.In order to suppress sidelobes further,a triple-stage AOTF is stuied.The theory of single-stage collinear and quasi-collinear AOTFs is analysed,and then the transfer function of the triple-stage filter is obtained.The calculated results demonstrate that the triple-stage device can provide significant improvement in sidelobe suppression;Experimental measurement shows that sidelobes are suppr...
出处 《光电子.激光》 EI CAS CSCD 北大核心 2009年第4期436-439,共4页 Journal of Optoelectronics·Laser
基金 国家自然科学基金资助项目(60478036)
关键词 集成光学 声光滤波器 可调谐滤波器 声光耦合 波分复用(WDM) integrated optics acoustooptical filters tunable filters acoustooptical coupling wavelength division multiplexing(WDM)
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