光阴极电子枪微波与激光同步系统研究

Research on the Synchronization System of Ultrafast Laser and the S-Band Microwave

光阴极微波电子枪中 ,微波与激光脉冲的同步问题是其能否稳定工作的关键之一 .我们自行设计、采用了一种取样锁相电路 ,用频率不很稳定的激光脉冲的基波与S波段高频微波直接取样鉴相 ,提高了锁相精度 ,实现了超快激光脉冲与高频微波的精准同步 ,这在国内还是第一次 .均方根时间抖动为 0 5 7ps ,时间抖动的最大值为 2 .6ps ,锁相精度完全满足SDUV项目光阴极微波电子枪的要求 .

We have synchronized a 102MHz ultrafast self-mode-locked Ti:sapphire laser to a 2856MHz RF source with the sample-locking technology. The relative root-mean-square time-jitter is 0.57ps and the maximum time jitter is 2.60ps.This is the first time to accomplish the synchronization between the ultrafast laser pulse and the S-band microwave in china.Potential applications include synchronization of lasers and RF power sources in particle accelerator experiments and high-resolution pump-probe experiments.