一阶无限抽头响应微波光子滤波器的品质因数分析  

Analysis of quality factor for one-order infinite impulse response microwave photonic filter

作　　者：祁春慧[1,2] 裴丽[1,2] 宁提纲[1,2] 李晶[1,2] 安丽靖[1,2] 高嵩[1,2] 

机构地区：[1]北京交通大学光波技术研究所,北京100044 [2]北京交通大学全光网与现代通信网教育部重点实验室,北京100044

出　　处：《红外与激光工程》2011年第7期1314-1317,共4页Infrared and Laser Engineering

基　　金：国家自然科学基金(60771008;60837002);北京市自然科学基金(4082024);留学回国人员基金(教外司留[2008]890号);教育部博士点基金(200800040002);中央高校基金科研业务费专项基金(2009YJS010)

摘　　要：随着人们对宽带无线通信带宽需求的不断增加,微波光子学器件的研究成为热点之一,近几年,光学器件的发展非常迅速,基于此的微波光子滤波器的应用和研究也逐步成熟起来。在深入研究微波光子滤波器性能理论的基础上,提出了一阶无限抽头响应的微波光子滤波器(IIRMPF)模型,利用自动控制原理动态结构图的变换知识进行理论推导,得出当反馈回路中加权系数和增益系数的乘积为1时,一阶IIRMPF可以得到最大的品质因数(Q值),并通过建立基于光纤布拉格光栅(FBG)和有源光纤的IIRMPF结构进行验证。结果表明,该结构与理论推导相吻合,最后实验制作了反射率分别为99.5%和50%的FBG,得到了Q值为804的微波光子滤波器响应。With the needs for the wide band wireless communication,researches on microwave photonic devices become one of the hot spots.Recently,the optical devices are developing fast.The application and study of microwave photonic filter（MPF） based on the optical devices are maturing gradually.In this paper,one-order infinite impulse response microwave photonic filter（IIRMPF） model was proposed based on the deep research of the MPF performance theory.When the product of weighting coefficient and gain coefficient in the feedback loop equals to 1,the biggest quality factor could be obtained in the IIRMPF based on the transform information of automation control theory dynamic structure diagram.Then,an IIRMPF structure based on the fiber Bragg grating（FBG） and active fiber was built to verify the conclusion.The result matches the theory very well.At last,the FBG with reflectivity of 99.5% and 50%is got respectively by experiment and a high Q value of 804 is realized.

关 键 词：微波光子滤波器 无限抽头响应 光纤布拉格光栅 品质因数 

分 类 号：TN713.1[电子电信—电路与系统]