Compact beat frequency locking and phase locking device for atom interferometer

The invention discloses a compact beat frequency locking phase locking device for an atom interferometer, which is characterized in that a radio frequency power detector detects a frequency locking signal output by a low-pass filter to obtain a frequency error signal, and inputs the frequency error signal into a servo feedback system; and the servo feedback system generates a frequency adjustmentsignal according to the frequency error signal, inputs the frequency adjustment signal to a first slave laser, and adjusts and locks the pump-back light to the atomic spectral line locking frequency corresponding to a master laser. A phase-locked loop outputs a phase error signal to a Raman optical servo feedback system, and the Raman optical servo feedback system generates a phase adjustment signal according to the phase error signal and inputs the phase adjustment signal to the second slave laser so as to lock the phase. For the atom interferometer, the whole frequency-locking and phase-locking part has good compact