698nm超稳激光研究进展  

Development of 698nm ultra-stable lasers

作　　者：刘涛[1,2] 陈龙[1,2] 张林波[1,2] 许冠军[1,2] 刘军[1,2,3] 董瑞芳[1,2] 张首刚[1,2] 

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院时间频率基准重点实验室,西安710600 [3]中国科学院大学,北京100049

出　　处：《时间频率学报》2016年第3期202-206,共5页Journal of Time and Frequency

基　　金：国家自然科学基金委重大科研仪器设备研制专项(61127901);国家自然科学基金资助项目(11273024);国家自然科学基金委青年科学基金资助项目(11403031);中国科学院重点部署资助项目(KJZD-EW-W02)

摘　　要：为满足新一代时间频率系统中锶原子光钟的研制任务的需求,研制了698 nm超稳激光系统。基于PDH激光稳频技术,将激光频率锁定在高精细度光学参考腔共振频率上,通过PID负反馈控制系统实现对激光频率的纠正,从而提高激光的频率稳定度。两套独立激光系统的拍频比对结果显示,单套激光系统的频率稳定度约2.5×10^(-15)/s,线宽是2 Hz。An ultra-stable laser system at 698 nm as local oscillator for strontium lattice clocks is developed for a new generation of time and frequency system. The output frequency of lasers is locked to a resonance of a rigid Fabry-Perot cavity with a high finesse based on the Pound-Drever-Hall technique. The fractional frequency stability is improved via the PID feedback control system correcting of laser frequency. The beat-note measurements between two independent frequency stabilized lasers show that the fractional frequency stability of one laser is about 2.5×10^-15 with 1 s averaging time and the linwidth is 2 Hz.

关 键 词：PDH稳频技术 光钟 超稳激光器 Fabry-Perot参考腔 

分 类 号：TN24[电子电信—物理电子学]