Microwave Pulse-Coherent Technique-Based Clock With a Novel Magnetron-Type Cavity

Qiang Hao , Wenxiang Xue, Wenbing Li, Feng Xu, Xin Wang, Wenge Guo, Peter Yun, and Shougang Zhang

We report a high-performance pulsed optically pumped (POP) Rb clock based on a novel magnetrontype microwave cavity. The cavity has a volume of 30 mL, enabling a highly homogenous microwave field distribution. With the laser frequency tuning to the ground-state hyperfine level F = 2 of the D2 line, we observe a Ramsey fringe contrast of 52% in terms of optical absorption detection. The resultant shot noise limit is estimated to be −14 −1/2 1.6 × 10 τ . The clock frequency stability is measured as 2.3 × 10−13 τ −1/2 (1–100 s), which is limited by the relative intensity noise of the light.

期刊名：IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL

期/卷：67

页码：873 - 878

发表时间：2020

DOI: https://doi.org/10.1109/TUFFC.2019.2955574