Coherent population trapping resonance signal interrogation based on grating magneto-optical trap
Coherent population trapping(CPT)atomic clock has irreplaceable advantages in miniaturization.The mid-long-term frequency stability of vapor cell-based CPT clock is limited by buffer gas collision and broadening.To overcome these limitations,the laser-cooling atom technique is an alternative method to improve the mid-long-term performance.However,the conventional cold atom system remains relatively complicate.A MOT based on planar elements is proposed,which consists of grating chip,coils chip,and a compact vacuum chamber.The 106 cold atoms are trapped with a single beam.Moreover,a laser stabilized on the Rb D2 line combined with time-multiplexed frequency shifting is proposed to realize laser cooling and CPT interrogation with a single laser.This work evaluates the potential for developing a miniature/compact high-performance cold atom CPT clock.
microwave atomic clockcoherent population trappinglaser coolinggrating chip
万方数据
维普
