An Atom SAGNAC Interferometer With Continuous Cold Atomic Beam Sources

We present an atom interferometer with two counter-propagating continuous cold atomic beam of
⁸⁷
Rb atoms as a gyroscope with high accuracy and high sampling rates. Two atomic beam sources are generated directly from 2D
⁺
Magneto-Optical Trappings (MOTs) with the flux of about 3×10
⁹
atoms/s and mean longitudinal velocity of 10 m/s. Raman-Ramsey interference is experimentally demonstrated with the central fringe width of 54 Hz.