A frequency shift compensation method for light shift and vapor-cell temperature shift in atomic clocks
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866911884919177216 |
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| author | Li, Dou Liu, Kangqi Zhao, Linzhen Kang, Songbai |
| author_facet | Li, Dou Liu, Kangqi Zhao, Linzhen Kang, Songbai |
| contents | Light shift and vapor-cell temperature shift are the two most significant factors dominating the long-term instability of compact atomic clocks. Due to the different physical mechanisms, there is not yet a solution that can effectively suppress the frequency shifts induced by these two effects. Here, we propose a 'resonance-offset' locking approach that compensates for the two physical frequency shifts. In this approach, the additional offset locking shift can effectively counteract the atomic resonance shifts arising from changes in vapor-cell temperature and light power, reducing the net impact on the clock's frequency to nearly zero. We have demonstrated this strategy on the 778 nm Rubidium two-photon optical frequency standard, successfully compensating for light shift and cell-temperature shift, respectively. This general method is particularly appealing for compact vapor-cell microwave and optical atomic clocks designed for the excellent stability rather than accuracy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_14281 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A frequency shift compensation method for light shift and vapor-cell temperature shift in atomic clocks Li, Dou Liu, Kangqi Zhao, Linzhen Kang, Songbai Atomic Physics Optics Light shift and vapor-cell temperature shift are the two most significant factors dominating the long-term instability of compact atomic clocks. Due to the different physical mechanisms, there is not yet a solution that can effectively suppress the frequency shifts induced by these two effects. Here, we propose a 'resonance-offset' locking approach that compensates for the two physical frequency shifts. In this approach, the additional offset locking shift can effectively counteract the atomic resonance shifts arising from changes in vapor-cell temperature and light power, reducing the net impact on the clock's frequency to nearly zero. We have demonstrated this strategy on the 778 nm Rubidium two-photon optical frequency standard, successfully compensating for light shift and cell-temperature shift, respectively. This general method is particularly appealing for compact vapor-cell microwave and optical atomic clocks designed for the excellent stability rather than accuracy. |
| title | A frequency shift compensation method for light shift and vapor-cell temperature shift in atomic clocks |
| topic | Atomic Physics Optics |
| url | https://arxiv.org/abs/2405.14281 |