Laser & Optoelectronics Progress, Volume. 60, Issue 11, 1106019(2023)
Realization of the 6Li Cold Atom Interferometer and Precise Measurement of Recoil Frequency
We report a cold atom interferometer based on the lightest alkali metal 6Li and measure its recoil frequency precisely, measuring the fine-structure constant on a preliminary basis. To overcome the challenges associated with magnetic-field sensitivity caused by the half-integer spin of atoms, a magnetically insensitive Raman transition and a conjugated Ramsey-Bordé interferometer involving crossed Raman beams and coherence time >2.3 ms is realized. The error in the angles between Raman beams is eliminated using four sets of interferometers developed based on geometric relationships. The measured recoil frequency ωr is
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Yang Rui, Liang Zhang, Chunyang Duan, Pengyue Liu, Shichuan Yu, Yuelong Wu, Haibin Wu. Realization of the 6Li Cold Atom Interferometer and Precise Measurement of Recoil Frequency[J]. Laser & Optoelectronics Progress, 2023, 60(11): 1106019
Category: Fiber Optics and Optical Communications
Received: May. 12, 2023
Accepted: May. 23, 2023
Published Online: Jun. 14, 2023
The Author Email: Wu Yuelong (ylwu@lps.ecnu.edu.cn)