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, ‡}

(a) Optimization of the angle of the two Glan–Taylor polarizers. The Ramsey amplitude (black squares and black linear fitted line) and the background (red dots and red quadratic fitted line) are dependent on the angle linearly and quadratically, respectively. The optimal angle θ = − 4 ° , according to the maximal contrast (blue triangles and fitted line). (b) Optimization of the 9.2 GHz RF power. The optimal RF power is measured to be 10 dBm.