基于激光器阵列的可调谐微波光子滤波器  

Tunable microwave photonic filter based on laser array

作　　者：陈天宇[1] 曹晔[1] 许东 李鑫阳 王振宇 CHEN Tianyu;CAO Ye;XU Dong;LI Xinyang;WANG Zhenyu(School of Electronic and Information Engineering,Qingdao University,Qingdao Shandong 266071,China;School of Electrical and Electronic Engineering,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]青岛大学电子信息学院,山东青岛266071 [2]天津理工大学电气电子工程学院,天津300384

出　　处：《光通信技术》2018年第9期11-13,共3页Optical Communication Technology

基　　金：国家自然科学基金应急管理项目(编号:11444001)资助

摘　　要：调谐范围、Q值和主旁瓣抑制比(MSSR)是微波光子滤波器(MPF)的重要性能指标,同时实现大调谐范围、高Q值、高主旁瓣抑制比的MPF鲜有报道。提出并通过仿真验证了一种基于激光器阵列的大范围可调谐微波光子滤波器。采用激光器阵列做光源,改变其输出波长间隔,即可实现滤波器自由频谱范围(FSR)的大范围调谐。使用光栅对和单模光纤级联作为色散器件,可获得较高的Q值和MSSR。引入切比雪夫窗,改善输出激光的抽头权重,可进一步提高MSSR。仿真实验结果表明,该实验方案实现了FSR的大范围调谐,调谐范围是5.59～37.32GHz,Q值高达558.7,MSSR高达151.122。Tuning range, Q value and main sidelobe suppression ratio（MSSR） are important performance indexes of microwave photonic filter（MPF）, and few reports on realizing the MPF with large tuning range, high Q value, and high MSSR. A tunable microwave photonic filter based on laser array is proposed and simulating demonstrated in this paper. By using laser array as light source and changing its output wavelength interval,the filter＇s free spectrum range（FSR） can be tuned in a wide range. Making grating pair and single-mode fiber cascaded as dispersive devices, higher Q and higher MSSR can be obtained. Employing Chebyshev window to changing the tap weight of output laser, the MSSR can be further improved. The simulation experiment results show that the experimental scheme realizes the wide tuning of FSR which is 5.59~37.32 GHz. The Q value is up to 558.7 and the MSSR is up to 151.122.

关 键 词：微波光子滤波器 激光器阵列 光栅对 切比雪夫窗 可调谐 主旁瓣抑制比 Q值 

分 类 号：TN713[电子电信—电路与系统]