Light shift suppression in a CPT magnetometer using linear polarization and double frequency interrogation
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912669629415424 |
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| author | Maldonado, M. A. Li, Yang McKelvy, James A. Matsko, Andrey Novikova, Irina Mikhailov, Eugeniy E. Kitching, John Wang, Ying-Ju |
| author_facet | Maldonado, M. A. Li, Yang McKelvy, James A. Matsko, Andrey Novikova, Irina Mikhailov, Eugeniy E. Kitching, John Wang, Ying-Ju |
| contents | We demonstrate a suppression of the light shift in a Coherent-Population-Trapping (CPT) atomic magnetometer by using linearly polarized light and a differential measurement between magnetic resonances. The radio frequency that creates the optical sidebands for CPT quickly switches between two magnetic sensitive transitions and the magnetic field is extrapolated from the difference of the center frequencies of the magnetic resonances. Light shifts and common drifts like collisional shifts can be suppressed through careful choice of measured resonances and we show the light shift reduction by more than a factor of 20 compared to excitation with circular polarized light. Various limitations to the method are discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_16159 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Light shift suppression in a CPT magnetometer using linear polarization and double frequency interrogation Maldonado, M. A. Li, Yang McKelvy, James A. Matsko, Andrey Novikova, Irina Mikhailov, Eugeniy E. Kitching, John Wang, Ying-Ju Atomic Physics Instrumentation and Detectors We demonstrate a suppression of the light shift in a Coherent-Population-Trapping (CPT) atomic magnetometer by using linearly polarized light and a differential measurement between magnetic resonances. The radio frequency that creates the optical sidebands for CPT quickly switches between two magnetic sensitive transitions and the magnetic field is extrapolated from the difference of the center frequencies of the magnetic resonances. Light shifts and common drifts like collisional shifts can be suppressed through careful choice of measured resonances and we show the light shift reduction by more than a factor of 20 compared to excitation with circular polarized light. Various limitations to the method are discussed. |
| title | Light shift suppression in a CPT magnetometer using linear polarization and double frequency interrogation |
| topic | Atomic Physics Instrumentation and Detectors |
| url | https://arxiv.org/abs/2510.16159 |