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Title: All acousto-optic modulator laser system for a 12 m fountain-type dual-species atom interferometer
Authors: He, Chuan
Yan, Sitong
Zhou, Lin
Barthwal, Sachin
Xu, Rundong
Zhou, Chao
Ji, Yuhang
Wang, Qi
Hou, Zhuo
Wang, Jin
Zhan, Mingsheng
Issue Date: Jun-2021
Publisher: Optical Society of America
Citation: Applied Optics, 2021, Vol.60, p5258-5265
Abstract: We design and implement a laser system for 85Rb and 87Rb dual-species atom interferometers based on acousto-optic frequency shift and tapered amplifier laser technologies. We use eight-pass acousto-optic modulators to generate repumping lasers for 85Rb and 87Rb atoms. The maximum frequency shift of the laser is 2.8 GHz, and the diffraction efficiency is higher than 20%. We use high-frequency acousto-optic modulators to generate the Raman lasers. This laser system uses only two seed lasers to provide the various frequencies required by 85Rb and 87Rb dual-species atom interferometers, which greatly improves laser usage. The laser system is applied in the equivalence principle test experiment using an 85Rb and 87Rb dual-species atom interferometer. The signal of atoms launched to 12 meters is successfully observed, and the resolution of gravity differential measurement is improved from 8×10−9 g to 1×10−10g.
Description: Open Access
ISSN: 1559-128X
2155-3165 (Online)
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Copyright: 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Appears in Collections:Research Papers (LAMP)

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