All acousto-optic modulator laser system for a 12 m fountain-type dual-species atom interferometer

We design and implement a laser system for Rb-85 and Rb-87 dual-species atom interferometers based on acoustooptic frequency shift and tapered amplifier laser technologies. We use eight-pass acousto-optic modulators to generate repumping lasers for Rb-85 and Rb-87 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 Rb-85 and Rb-87 dualspecies atom interferometers, which greatly improves laser usage. The laser system is applied in the equivalence principle test experiment using an Rb-85 and Rb-87 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 x 10(-9) g to 1 x 10(-)(10) g. (C) 2021 Optical Society of America