Scheme for suppressing atom expansion induced contrast loss in atom interferometers
| Autor: | Hu, Qing-Qing, Luo, Yu-Kun, Jia, Ai-Ai, Wei, Chun-Hua, Yan, Shu-Hua, Yang, Jun |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Optics Communications 2016 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.optcom.2016.12.054 |
| Popis: | The loss of contrast due to atom expansion induced non-perfect Raman pulse area in atom interferometers is investigated systematically. Based on the theoretical simulation, we find that the expansion of the atomic cloud results in a decrease of the {\pi} pulse fidelity and a change of the {\pi} pulse duration, which lead to a significant reduction in fringe contrast. We propose a mitigation strategy of increasing the intensities of the second and third Raman pulses. Simulation results show that the fringe contrast can be improved by 13.6% in a typical atom interferometer gravimeter using this intensity compensation strategy. We also evaluate the effects of this mitigation strategy in the case of a lower atomic cloud temperature and a larger Raman beam size under different Raman pulse time interval conditions. This mitigation strategy has potential applications in increasing the sensitivity of atom interferometer-based precision measuring, including precision measuring of the gravity, gravity gradient, rotation, and magnetic field gradient, as well as testing of the Einstein equivalence principle. Comment: 14 pages, 8 figures |
| Databáze: | arXiv |
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