载频带宽同步倍频的高频大带宽线性调频信号光产生方法  

Photonic generation of linearly chirped microwave signal with high frequency and large bandwidth via frequency and bandwidth multiplication

作　　者：丛雯珊 余岚[1] 沃江海 王亚兰 王安乐 CONG Wenshan;YU Lan;WO Jianghai;WANG Yalan;WANG Anle(Early Warning Technology Department,Air Force Early Warning Academy,Wuhan 430019,China)

机构地区：[1]空军预警学院预警技术系

出　　处：《国防科技大学学报》2019年第5期140-146,共7页Journal of National University of Defense Technology

基　　金：国家自然科学基金青年科学基金资助项目(61701532)

摘　　要：针对高载频、大带宽线性调频信号产生需求,提出一种基于级联马赫-曾德尔调制器(Mach-Zehnder Modulator,MZM)的载频带宽同步倍频的高载频、大带宽线性调频信号光产生方法。理论分析表明,通过合理设置级联MZM的直流偏置点和线性调频信号幅度等参数,可产生载频和带宽同步倍频且倍频系数可调的线性调频信号。在此基础上利用光学系统软件进行相应的仿真验证,利用载频和带宽分别为5 GHz和2 GHz的线性调频信号产生了载频和带宽分别为40 GHz、15.07 GHz和58.25 GHz、19.5 GHz的线性调频信号。仿真结果验证了该方法的可行性,也验证了产生的信号具有较好的压缩性。Aiming at the requirement of generating the linearly chirped microwave signal with high frequency and large bandwidth,an approach based on cascaded MZM(Mach-Zehnder modulator)to generate linearly chirped microwave signal with high-frequency and large-bandwidth via frequency and bandwidth multiplication was proposed.From the theoretical analysis,the linearly chirped microwave signal with variable multiplication factor of the carrier frequency and bandwidth was generated by properly adjusting the direct current bias points and the modulation index of the cascaded MZM.On the basis of this,the corresponding simulations were performed on the optical system software platform.The linearly chirped microwave signals with the carrier frequency and bandwidth of 40 GHz,15.07 GHz and 58.25 GHz or 19.5 GHz were generated from a 5 GHz or 2 GHz linearly chirped drive signal respectively.The simulation results verify the feasibility of the proposed approach and the superior compression of the generated signal.

关 键 词：线性调频信号 高载频 大带宽 级联MZM 

分 类 号：TN929.11[电子电信—通信与信息系统]