基于相干接收机的超高分辨率相干光谱分析  

Ultrahigh-Resolution Coherent Spectral Analysis Based on Coherent Receivers

作　　者：梁进荣 刘嫱 李尚远[2] 耿敏明[1] 张振荣[1] Liang Jinrong;Liu Qiang;Li Shangyuan;Geng Minming;Zhang Zhenrong(School of Computer,Electronics and Information,Guangxi University,Nanning 530004,Guangxi,China;Beijing National Research Center for Information Science and Technology,Department of Electronic Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]广西大学计算机与电子信息学院,广西南宁530004 [2]清华大学电子工程系北京信息科学与技术国家研究中心,北京100084

出　　处：《激光与光电子学进展》2023年第19期243-247,共5页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61965003,61741504);广西自然科学基金(2018GXNSFAA294133)。

摘　　要：提出了一种基于相干接收机的相干光谱分析方案。采用相干接收机将待测信号与本振光进行同相和正交(IQ)混频和平衡探测,依据光外差原理计算出待测信号的功率,根据所计算出的功率与相应的本振频率之间的映射关系对待测信号的光谱进行重构。实验结果表明,当本振的扫描速率在80~200 nm/s范围时,分辨率优于12.5 MHz。所提出的光谱分析方案具备超高分辨率,可用于快速提取超密集波分复用系统精细的光谱结构。A coherent spectrum analysis scheme based on a coherent receiver is proposed.The coherent receiver is used to perform in-phase and quadrature(IQ)mixing and balanced detection of the signal under test and optical local oscillator.The power of the signal under test is calculated according to the optical heterodyne principle,and the spectrum of the signal under test is reconstructed according to the mapping relationship between the calculated power and the corresponding frequency of the optical local oscillator.The experimental results show that the resolution is above 12.5 MHz when the sweeping rate of the optical local oscillator is in the range of 80-200 nm/s.The proposed spectral analysis scheme has an ultrahigh resolution and can be used to rapidly extract the fine spectral structure of ultradense wavelength division multiplexing systems.

关 键 词：光谱学 光外差 相干接收机 超密集波分复用 超高分辨率 

分 类 号：TN929.1[电子电信—通信与信息系统]