| 基于外腔半导体激光器的微型原子钟 |
| Miniature Atomic Clock Based on External Cavity Diode Laser |
| 投稿时间：2024-12-31 修订日期：2025-01-16 |
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| 中文摘要: |
| 基于相干布居囚禁（coherent population trapping, CPT）现象的原子钟能够实现微型甚至芯片级产品，是原子钟领域研究的热点之一。目前微型和芯片级CPT原子钟普遍使用垂直腔面发射激光器（VCSEL），但VCSEL的输出功率较低，同时线宽较大，限制了CPT原子钟频率稳定度的进一步提升。针对该问题，设计了一种适用于微型CPT铷原子钟、波长为795 nm的微型外腔半导体激光器（External Cavity Diode Laser，ECDL），测试了该激光器的性能参数。基于该ECDL，首次实现了非VCSEL光源的微型原子钟设计验证，短期频率稳定度达到4.2E-11@1s，3.01E-12@1000s，对后续实现高性能微型甚至芯片级原子钟产品有重要意义。 |
| 英文摘要: |
| Atomic clock based on coherent population trapping (CPT) phenomenon can achieve miniature or even chip-scale products, which is one of the hotspots in the field of atomic clock research. At present, vertical cavity surface emitting lasers (VCSEL) are commonly used in miniature and chip-scale CPT atomic clocks. However, VCSEL has lower output power and larger linewidth, which limits the further improvement of CPT atomic clock frequency stability. A miniature external cavity diode laser (ECDL) with a wavelength of 795 nm was designed for CPT miniature rubidium atomic clock to address this issue. Based on this ECDL, a miniature atomic clock with non-VCSEL light source has been achieved for the first time, with a short-term frequency stability of 4.2E-11@1s and 3.01E-12@1000s. This is of great significance for the subsequent realization of high-performance miniature even chip-scale atomic clock products. |
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| 中文关键词: 外腔半导体激光器 相干布居囚禁 微型原子钟 窄线宽激光器 |
| 英文关键词:External cavity diode laser Coherent population trapping Miniature atomic clock Narrow linewidth laser |
| 基金项目:北京市科技新星计划（20240484696）；科技创新2030“量子通信与量子计算机”重大项目 （2021ZD0303200）；温州重大科技创新项目（ZG2020046）；真空技术与物理重点实验室基金（6142207220101）；2024甘肃省人才重点项目 |
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