Ramsey-coherent population trapping Cs atomic clock based on lin∥lin optical pumping with dispersion detection

Cheng Peng-Fei^{1, 2}, Zhang Jian-Wei^{2, 3, †}, Wang Li-Jun^{1, 2, 3, ‡}

Measured clock frequency stability. The red dots and line are the measured frequency stability of the free-running LO, which is approximately 1.6 × 10 − 12 at 1 s, and then deteriorates to 4.6 × 10 − 12 at 200 s. The LO-locked frequency stability (black squares and line) is measured to be 1.3 × 10 − 12 / τ up to 20 s and then reaches the flick floor, which is approximately 3.1 × 10 − 13 . Note here that a linear drift of 6.8 × 10 − 18 τ has been removed.