基于PolM的微波光子线性优化链路  

A linearly optimized microwave photonic link based on PolM

作　　者：刘婷[1,2] 陈博[1] 柳钰[1] 薛小庆[1] 郗艳华[1] 张玉叶[1] LIU Ting;CHEN Bo;LIU Yu;XUE Xiaoqing;XI Yanhua;ZHANG Yuye(School of Physics&Electronic Engineering,Xianyang Normal University,Xianyang 712000,China;School of Opto-electronical Engineering,Xi’an Technological University,Xi’an 710021,China)

机构地区：[1]咸阳师范学院物理与电子工程学院,陕西咸阳712000 [2]西安工业大学光电学院,陕西西安710021

出　　处：《现代电子技术》2024年第11期1-5,共5页Modern Electronics Technique

基　　金：陕西省重点研发计划项目(2021NY-213);陕西省教育厅科研计划项目(19JK0928);咸阳师范学院“青年骨干教师”培养项目(XSYGG201603);咸阳师范学院教育教学改革研究项目(2023YB62,2023C129);陕西省大学生创新创业训练计划项目(S202310722028)。

摘　　要：文中提出一种利用偏振调制器(PolM)提高系统无杂散动态范围(SFDR)的方案,并进行了仿真验证。实现线性优化的原理是通过对微波光子链路中上下两路光载波进行完全抑制和部分抑制,使生成不同来源的三阶交调失真(IMD3)在电域实现自抵消。仿真结果表明,IMD3的抑制比可达到61.9 dB,系统的三阶无杂散动态范围可达到107 dB·Hz^(2∕3)。该方案具有结构简单、实施难度低、大工作带宽和大动态范围的优势,在宽带无线通信、雷达、电子战系统中具有较大的应用潜力。A scheme to improve the spurious⁃free dynamic range(SFDR)of the system by polarization modulator(PolM)is proposed and it has been verified by simulation.In the microwave photonic link,the principle of linear optimization is to completely suppress the optical carrier in upper branch and partially suppress the optical carriers in the lower branch in the microwave photonic link,so that the generated third⁃order intermodulation distortion(IMD3)from different sources can be self⁃cancelled in the electrical domain.The simulation results show that the rejection ratio of IMD3 can reach 61.9 dB,and the third⁃order SFDR can reach 107 dB·Hz^(2∕3).The proposed scheme has the advantages of simple structure,low implementation difficulty,large bandwidth and large SFDR,and has great application potential in broadband wireless communications,radars and electronic warfare systems.

关 键 词：微波光子 偏振调制器 无杂散动态范围 三阶交调失真 偏振控制器 光载波 

分 类 号：TN29-34[电子电信—物理电子学]