摘要
介绍了一种新型的可搬运铯原子钟,采用非均匀磁场进行选态,采用与4-5循环跃迁线共振的激光进行检测。介绍了此方案的物理系统、光学系统和电路系统。进一步展示了基于此方案原子钟的整机与指标,最佳整机体积4U,稳定度达到4×10^(-13)@100 s,4.5×10^(-14)@10000 s,2.2×10^(-14)@1 d,优于可搬运铯钟典型产品5071A优质型。将此方案与磁选态磁检测铯原子钟和光抽运铯原子钟进行了对比,并给出了此方案的优点与待解决的问题。最后介绍了两种针对磁选态光检测铯钟的可行性改善,一种为采用3-2循环跃迁线检测的反选型原子钟,一种为采用光抽运-磁选态的混合选态型原子钟,有望进一步提升稳定度指标至稳定度低于3×10^(-13)@100 s。
The article introduces a new compact cesium beam clock with a non-uniform magnetic field for state selection and a laser that resonates with D 24-5 line for detection.The basic structure which contains the physical system,the optical system,and the servo system as well as the operation principle of the clock,is described.A 4U size prototype with stability of 4.0×10^(-13)@100 s,4.5×10^(-14)@10000 s and 2.2×10^(-14)@1 d is realized,which is better than high performance type 5071A cesium beam clock.The clock is compared with the conventional cesium beam clock and the optically pumped cesium beam clock.The advantages and disadvantages of the clock are analyzed.Two feasible improved schemes are introduced,which are expected to further improve the stability to better than 3×10^(-13)@100 s.One scheme uses a laser that resonates with D 23-2 line for detection.The other scheme uses optical pumping and non-uniform magnetic field together for state preparation.
作者
李源昊
陈思飞
刘晨
范利锋
王延辉
Li Yuanhao;Chen Sifei;Liu Chen;Fan Lifeng;Wang Yanhui(School of Electronics,Peking University,Beijing 100871,China;State Key Laboratory of Advanced Optical Communication Systems and Networks,Peking University,Beijing 100871,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2024年第2期112-119,共8页
Chinese Journal of Scientific Instrument
基金
教育部联合基金(8091B042103)项目资助。
关键词
原子钟
铯原子钟
可搬运铯原子钟
磁选态
光检测
atomic clock
cesium clock
compact cesium clock
magnetic state selection
optical detection
