基于光学锁相环的三波长大范围快速移频研究  

Three-Wavelength Wide-Range Fast Frequency Shift Based on Optical Phase-Locked Loop

作　　者：赵延会 杨敏 于广礼 丁建永[1,2] 陈卫标 胡芳仁 Zhao Yanhui;Yang Min;Yu Guangli;Ding Jianyong;Chen Weibiao;Hu Fangren(College of Electronic and Optical Engineering&College of Microelectronics,Nanjing University of Posts and Telecommunications,Nanjing 210046,Jiangsu,China;Advanced All Solid State Laser Technology R&D Center,Nanjing Institute of Advanced Laser Technology,Nanjing 210038,Jiangsu,China;Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China)

机构地区：[1]南京邮电大学电子与光学工程学院、微电子学院,江苏南京210046 [2]南京先进激光技术研究院先进全固态激光技术研发中心,江苏南京210038 [3]中国科学院上海光学精密机械研究所,上海201800

出　　处：《激光与光电子学进展》2024年第9期397-402,共6页Laser & Optoelectronics Progress

摘　　要：三频比率技术是钠多普勒激光雷达探测大气中层顶区温度和风场的重要技术,实现三频比率技术要求发射的三束589 nm波长激光(f_(+),f_(0),f_(-))频率稳定、频率切换速度快以及两个频率(f_(+),f_(-))相对中心频率(f_(0))偏频锁定630 MHz。为满足上述技术需求,提出一种基于光学锁相环(OPLL)实现三频比率技术的方案。利用OPLL实现偏频锁定,偏频锁定范围为±(200~2500) MHz,最小步进为200 kHz,拍频信号抖动在±50 Hz以内。通过设置移频值和改变误差信号的极性,使从激光器波长不断变化,实现三波长输出。优化PID(proportional,integral,derivative)电路,提高了拍频信号的稳定性,减小了频率切换时间,切频时间小于10 ms。实验结果表明,该OPLL系统可以实现三个频率快速切换锁定,满足三频比率技术需求。Threefrequency ratio technology is important for sodium Doppler lidar to detect the temperature and wind field in the mesosphere.To realize this technology,three emitted lasers with 589 nm wavelength(f_(+),f_(0),f_(-))should be frequency stable,the frequency switching speed should be fast and the two frequencies(f_(+),f_(-))should be frequency locked to 630 MHz relative to the central frequency(f_(0)).In order to meet the above technical requirements,a scheme based on optical phaselocked loop(OPLL)is proposed to realize threefrequency ratio technology.The OPLL is used to realize frequency offset locking.The frequency offset locking range is±(200~2500)MHz,the minimum step is 200 kHz and the jitter of the beat signal is within±50 Hz.By setting the frequency shift value and changing the polarity of the error signal,the wavelength of the slave laser is constantly changed,and the threewavelength output is realized.The PID(proportional,integral,derivative)circuit is optimized to improve the stability of the beat signal,reduce the frequency switching time and the frequency cutting time is less than 10 ms.The experimental results show that the OPLL system can realize fast switching and locking of three frequencies and meet the technical requirements of threefrequency ratio technology.

关 键 词：偏频锁定 光学锁相环 快速切频 三频比率技术 

分 类 号：TN249[电子电信—物理电子学]