太赫兹科学与电子信息学报, 2015, 13 (4): 649, 网络出版: 2016-01-26
基于 85Rb的微型化 CPT原子钟的设计和实现
A design and implementation of miniature CPT atomic clock based on 85Rb
摘要
介绍基于 85Rb原子相干布居囚禁(CPT)现象的微型原子钟的设计与实现，系统以 MSP430单片机作为主控芯片，实现电流源、TCXO和射频等功能模块，并与 CPT原子钟物理部分实现联调与整机封装，实现了高稳定度、低功耗的小型 CPT原子钟。整机体积只有 31 cm3，功耗为 660 mW，测得 10 MHz输出信号稳定度约为 2×10-10 s-1,4×10-11/1 000 s。系统采用全宽调制在 85Rb的D1线实现CPT原子钟方案，可提升 CPT共振谱线对比度，提高原子钟稳定度。
Abstract
A Coherent Population Trapping(CPT) atomic clock servo control circuit is designed based on the CPT phenomenon of 85Rb. Taking MSP430 chip as a platform, combining with the physical device made up of Vecsel laser, photoelectric detector, and small 85Rb vapor cell, a miniature atomic clock with the high-performance, high stability, low power consumption and small size is implemented. The volume is 31 cm3 and the power consumption is 660 mW. The frequency stability of 10 MHz measured is 2×10-10/s, 4×10-11/1 000 s. Full-hyperfine-splitting frequency modulation is used to improve the frequency stability.
段巍, 邢城, 赵建业. 基于 85Rb的微型化 CPT原子钟的设计和实现[J]. 太赫兹科学与电子信息学报, 2015, 13(4): 649. DUAN Wei, XING Cheng, ZHAO Jianye. A design and implementation of miniature CPT atomic clock based on 85Rb[J]. Journal of terahertz science and electronic information technology, 2015, 13(4): 649.
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