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北京大学实验室实现了光抽运铯束频标数字微波调频及数字伺服锁定。频率秒级稳定度达到１１×１０－１１。实验中发现微波双频功率的不平衡对频标准确度影响很大。本文报告了实验结果，并给出了理论解释和计算。计算结果与实验数据符合得很好。
Peking University laboratory to achieve the optical pumping cesium beam frequency standard digital microwave FM and digital servo lock. The frequency of second-level stability reached 1 1 × 10-11. The experiment found that the imbalance of microwave dual-frequency power has a great impact on the accuracy of the frequency standard. This paper reports the experimental results and gives theoretical explanations and calculations. The calculated results are in good agreement with the experimental data.