A Simplified Laser System for Atom Interferometry Based on a Free-Space EOM

In this paper, a compact laser system for 87Rb atom interferometry based on only one free-space electro-optic modulator (EOM) was realized, where repumping and Raman beams were generated with a free-space EOM. In addition, this laser system does not require a laser amplifier compared to fibered EOM...

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Published inPhotonics Vol. 9; no. 5; p. 301
Main Authors Wu, Bin, Zhao, Yingpeng, Cheng, Bing, Zhang, Can, Li, Dianrong, Zhu, Dong, Yue, Yazhou, Li, Jun, Zhang, Kaijun, Lin, Qiang, Weng, Kanxing
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.05.2022
Subjects
atom interferometer
Atom interferometry
Cooling
Experiments
free-space EOM
High power lasers
Interference fringes
Interferometry
laser system
Lasers
Spectrum analysis
Theoretical analysis
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Summary:In this paper, a compact laser system for 87Rb atom interferometry based on only one free-space electro-optic modulator (EOM) was realized, where repumping and Raman beams were generated with a free-space EOM. In addition, this laser system does not require a laser amplifier compared to fibered EOM since fibered EOM cannot transmit high-power lasers. However, due to the narrow modulation linewidth of free-space EOM, it is impossible to obtain the frequencies of repumping and Raman beams separately, which would lead to some complicated effects. Therefore, a theoretical analysis was carried out to solve this problem, and a new frequency scheme for AI is proposed. For the experiment, the laser system of AI was built up. Moreover, the atomic interference fringes were obtained with a contrast of 20.7% (T = 60 ms) and the fitted phase resolution is approximately 1.25 mrad. The presented laser system could provide a new solution for compact AI systems in the future.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics9050301