连续激光载波同步系统的慢漂抑制  

Slow drift suppression of continuous laser carriersynchronization system

作　　者：贾燕庆 杜应超[1] 黄文会[1] Jia Yanqing;Du Yingchao;Huang Wenhui(Department of Engineering Physics,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学工程物理系,北京100084

出　　处：《强激光与粒子束》2024年第6期97-102,共6页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(12027902)。

摘　　要：高精度同步系统是加速器产生高品质束流的关键因素之一,基于清华大学已有的连续激光载波同步系统,对不同接收端之间参考微波信号相位差的长时漂移,即同步系统慢漂进行了研究,提出了一种基于接收端参考微波信号幅值的电光调制器(EOM)偏置电压控制方法抑制慢漂。采用该方法后,清华大学甚高频光阴极电子枪测试平台L波段(1300 MHz)同步系统慢漂被抑制到10.45 fs@24 h,清华大学汤姆逊散射装置(TTX)S波段(2856 MHz)同步系统慢漂被抑制到10.53 fs@24 h,并且该方法可以使整套同步系统工作于室温环境,有效地提高了同步系统对工作环境温度的适应性。The high-precision synchronization system is one of the key factors for the accelerator to generatehigh-quality beams.Based on the existing continuous laser carrier synchronization system of Tsinghua University,thispaper analyzes the long-term drift of the reference microwave signal phase difference between different receivingends,that is,the slow drift of the synchronization system.An electro-optic modulator(EOM)bias voltage controlmethod based on the amplitude of the reference microwave signal at the receiving end was proposed to suppress theslow drift.After adopting this method,the slow drift of the L-band(1300 MHz)synchronization system of TsinghuaUniversity’s VHF band photocathode electron gun test platform was suppressed to 10.45 fs@24 h,and the slow driftof the S-band(2856 MHz)synchronization system of Tsinghua University’s Thomson Scattering Facility(TTX)wassuppressed to 10.53 fs@24 h.Moreover,this method can make the entire synchronization system work in a roomtemperature environment,effectively improving the adaptability of the synchronization system to the workingenvironment temperature.

关 键 词：同步系统 加速器 连续激光载波 慢漂 

分 类 号：G312[文化科学]