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@10 000 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.
Research on high-performance compact cesium clock using magnetic state selection and optical detection
The article introduces a new compact cesium beam clock with a non-uniform magnetic field for state selection and a laser that resonates with D2 4-5 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@10 000 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 D2 3-2 line for detection.The other scheme uses optical pumping and non-uniform magnetic field together for state preparation.
atomic clockcesium clockcompact cesium clockmagnetic state selectionoptical detection
万方数据
维普
