国产高性能光抽运小铯钟研制进展  

Progress of domestic high performance optically pumped compact cesium clocks

作　　者：贺轩 袁志超 陈佳源 陈徐宗[1] 王青[2] 齐向晖[1] HE Xuan;YUAN Zhichao;CHEN Jiayuan;CHEN Xuzong;WANG Qing;QI Xianghui(Institute of quantum electronics,Peking University,Beijing 100871,China;Center for experimental electronics and information,Peking University,Beijing 100871,China)

机构地区：[1]北京大学量子电子学研究所,北京100871 [2]北京大学电子信息科学基础实验中心,北京100871

出　　处：《计测技术》2023年第3期99-106,共8页Metrology & Measurement Technology

基　　金：国家自然科学基金(11920101004,11334001,61727819,61475007);国家重点基础研究发展计划(2021YFA1400900,2021YFA0718300)。

摘　　要：介绍了北京大学利用光抽运小铯钟相比于传统的磁选态小铯钟有更高的铯原子利用率的优势,在频率稳定度方面取得的突破性进展;总结出了光抽运小铯钟达到高性能的关键因素在于铯束管优值、激光稳频和电路地噪声;最终优化后的光抽运小铯钟频率稳定度均超过了5071A优质管2倍以上,典型值为3×10^(-12)/τ^(1/2);近三年来陆续研制出8台光抽运小铯钟,初步实现了高性能光抽运小铯钟工程化。The advantage of optically pumped compact cesium clocks is that they have a higher utilization of atoms compared to traditional magnetic state-selection cesium clocks.The group in Peking University has made breakthroughs in the frequency stability of optically pumped compact cesium clocks.The key factors for achieving high performance of optically pumped compact cesium clocks are the cesium beam tube,laser frequency stabilization,and circuits.The frequency stability of the optimized optically pumped compact cesium clock exceeds by more than twice that of the 5071A high-performance cesium beam tubes,with a typical value of 3 × 10~(-12)/τ~(1/2).Eight optically pumped compact cesium clocks have been developed in the past three years.And the commercial high performance optically pumped compact cesium clocks have been preliminarily realized.

关 键 词：原子钟 小铯钟 光抽运 频率稳定度 信噪比 

分 类 号：TB939[一般工业技术—计量学]