基于多个FBG对共振腔微波光子滤波器的研究  

Study of Resonance Cavity Microwave Photonic Filter Based on Multiple Pairs of FBGs

作　　者：聂奎营[1] 胡总华[1] 王传坤[1] 王旭[2] 

机构地区：[1]兴义民族师范学院,贵州兴义562400 [2]河南师范大学物理与信息工程学院,河南新乡453007

出　　处：《光电子技术》2014年第3期180-183,191,共5页Optoelectronic Technology

基　　金：黔西南州科技计划(2013-2);黔西南州科技计划(2013-3)

摘　　要：在深入研究微波光子滤波器理论的基础上,提出了基于多个FBG对共振腔的微波光子滤波器,根据vernier效应得到了该系统的传输函数。以由两个FBG对组成的微波光子滤波器为例,讨论了反射率R和FBG对之间的间距L对系统传输性能的影响。并进一步研究了组合更多FBG对的微波光子滤波器传输性能,结果表明,随着组合基本陷波滤波器个数的增加,并通过调节FBG对之间的间距L,得到了高抑制比,大自由频程,高Q值的微波光子滤波器。Based on the thorough research of the theory of the microwave photonic filter, a resonance cavity microwave photonic filter based on multiple pairs of FBGs is proposed. The transfer function of the system is obtained according to vernier effect. With the microwave pho- tonic filter that is made up of two pairs of FBGs set as example, the effect of the reflectivity R and the distance L between a pair of FBG on the transmission characteristics of the system is dis- cussed. Furthermore, the transmission performances of microwave photonic filter which com- bined more pairs of FBGs are investigated. It is experimentally shown that the microwave pho- tonic filter with high rejection ratio, large FSR and high Q value is obtained with the increase of the number of combined basic notch filters, and by adjusting the distance L between a pair of FBG.

关 键 词：微波光子滤波器 光纤光栅 滤波响应 抑制谐波 

分 类 号：TN713.1[电子电信—电路与系统]