国产激光管在磁选态光检测铯原子钟中的应用研究

Research on the application of domestic lasers in the optically detected magnetic-state-selection cesium atomic clock

在科学仪器国产化背景下,为了改变磁选态-光检测型铯原子钟仍依赖进口激光管的现状,进行国产DFB-LD激光管在磁选态-光检测铯束管上的应用和外差法拍频测试,并分析其与国外TOPTICA Photonics DFB-LD激光管之间的差别。结果显示:国产激光管线宽为1.999 MHz±6 kHz,频率稳定度为1×10^(-11)@100 s,采用国产激光管可以在国产铯束管上实现标准型应用指标(1.45×10^(-12)@100 s),这为进一步提升国产激光管的性能提供了思路和借鉴。未来需要进一步压窄国产激光管线宽,以实现更高的小型铯束钟指标。

Under the background of domestic scientific instruments,in order to change the situation that the optically detected magnetic-state-selection cesium atomic clock still depends on imported lasers,three domestic distributed-feedback laser(DFB-LD)tubes were applied to the optically detected magnetic-state-selection cesium atomic clock,and the heterodyne beat-note measurement were conducted.In addition,the differences between these lasers and TOPTICA Photonics DFB-LD were analyzed.The experiment results show that the linewidth of the domestic laser is 1.999 MHz±6 kHz,and its frequency stability is 1×10^(-11)@100 s;the domestic lasers can achieve the standard specification(1.45×10^(-12)@100 s)on the domestic cesium beam tube,which provides ideas and references for further improving the performance of domestic lasers.Narrowing the domestic laser linewidth will be required in the future to achieve higher specifications of the compact cesium beam clock.