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| 冷原子光栅磁光阱的研制及CPT信号的探询 |
| Towards cold atom coherent population trapping clock based on compact physics package |
| 投稿时间：2023-08-28 修订日期：2024-04-12 |
| DOI： |
| 中文关键词: 微波原子钟 相干布居囚禁 激光冷却 光栅芯片 |
| 英文关键词:Microwave atomic clock Coherent population trapping Laser cooling Grating chip |
| 基金项目:国家重点研发计划（2021YFF0603701）项目资助，国家自然科学基金(12273087)项目资助 |
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| 中文摘要: |
| 相干布居囚禁原子钟在小型化方面具备不可替代的优势。由于热原子气室内部高压缓冲气体的限制,导致其频率稳定度仍有进一步提升的空间。利用激光冷却原子技术作为替代,可以有效提升其中长期性能。然而,目前的冷原子物理系统仍然相对复杂,不利于原子钟整体系统的集成化和小型化。我们研制了高衍射效率光栅芯片、平面磁阱芯片以及微小型真空腔室,共同构建基于平面核心器件的磁光阱，利用单光束捕获冷原子2×106个。此外，为了简化CPT冷原子钟的激光系统,通过单激光结合时分复用系统的方式,仅用单一Rb D2线激光实现了原子冷却与CPT探询。以上的工作为将来实现微小型化高性能冷原子CPT钟的最终锁定和性能评估奠定了重要理论和技术基础。 |
| 英文摘要: |
| Coherent population trapping atomic clock have irreplaceable advantages in miniaturization. The mid long-term frequency stability of vapor cell-based CPT clock is limited by buffer gas collision and broadening. To overcome these limitations, the laser-cooling atom technique is an alternative approach to improve the mid long-term performance. However, the conventional cold atom system remains relative complicate. Here we demonstrated a MOT based on planar elements consists of grating chip, coils chip and compact vacuum chamber. 106 cold atoms are trapped with a single beam. Moreover, a laser stabilized on Rb D2 line combined with time multiplexed frequency shifting is proposed to realize laser cooling and CPT interrogation with a single laser. This work validates the potential for developing miniature/compact high performance cold atom CPT clock. |
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