Low-phase noise and high-power laser for Bragg atom interferometer

Yuan Cheng; Ke Zhang; Le-Le Chen; Wen-Jie Xu; Qin Luo; Min-Kang Zhou; Zhong-Kun Hu

doi:10.1063/1.5001963

AIP Advances (Sep 2017)

Low-phase noise and high-power laser for Bragg atom interferometer

Yuan Cheng,
Ke Zhang,
Le-Le Chen,
Wen-Jie Xu,
Qin Luo,
Min-Kang Zhou,
Zhong-Kun Hu

Affiliations

Yuan Cheng: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People’s Republic of China
Ke Zhang: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People’s Republic of China
Le-Le Chen: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People’s Republic of China
Wen-Jie Xu: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People’s Republic of China
Qin Luo: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People’s Republic of China
Min-Kang Zhou: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People’s Republic of China
Zhong-Kun Hu: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People’s Republic of China

DOI: https://doi.org/10.1063/1.5001963
Journal volume & issue: Vol. 7, no. 9
pp. 095211 – 095211-6

Abstract

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We present a laser system with low-phase noise and an output power up to 8.8 W at 780 nm for driving Bragg transitions in a 87Rb fountain. An optical phase-locked loop (OPLL) is employed to restrain the phase noise that arises from the spatial separation of the two Bragg beams at low frequencies. The residual phase variance is suppressed by two orders around 400 Hz. A Mach-Zehnder Bragg atom interferometer, based on the four-photon recoil scheme, has been realized using this laser system. This interferometer shows a resolution of 5×10−9g at an integration time of 1200 s for gravity measurements.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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