Precise calibration of zero-crossing temperature and drift of an ultralow expansion cavity with a clock transition spectrum
Precise calibration of zero-crossing temperature and drift of an ultralow expansion cavity with a clock transition spectrum
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利用时钟跃迁谱精确校准超低膨胀腔的过零温度和漂移
DOI：
10.1088/1674-1056/27/5/053201
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发表时间：
2018-05
期刊：
影响因子：
--
通讯作者：
Bao-Long Lyu
中科院分区：
文献类型：
--
作者：
Hui Liu;Kun-Liang Jiang;Jin-Qi Wang;Zhuan-Xian Xiong;Ling-Xiang He;Bao-Long Lyu
本文提出了一种时钟跃迁谱方法，用于校准超低膨胀（ULE）腔的过零温度和频率漂移，其分辨率达到赫兹级。利用这种方法，可以清楚地显示出ULE腔沿着各种受控温度的线性和非线性漂移。当ULE腔的受控温度被调谐远离ULE腔的过零温度时，腔表现出越来越大的非线性漂移。根据我们的理论分析和实验结果，我们研究了ULE腔在过零温度附近的漂移特性，这是以前很少探索的。我们可以肯定地得出结论，我们在镱（Yb）晶格时钟中使用的ULE腔的零交叉温度约为31.7摄氏度。
We report a clock transition spectrum approach, which is used to calibrate the zero-crossing temperature and frequency drift of an ultralow expansion (ULE) cavity with a Hertz level resolution. With this approach, the linear and nonlinear drifts of the ULE cavity along a variety of controlled temperatures are clearly presented. When the controlled temperature of ULE cavity is tuned away from the zero-crossing temperature of the ULE cavity, the cavity shows larger and larger nonlinear drift. According to our theoretical analysis and experimental results, we investigate more details of the drift property of the ULE cavity around the zero-crossing temperature, which has seldom been explored before. We can definitely conclude that the zero-crossing temperature of our ULE cavity used in an ytterbium (Yb) lattice clock is around 31.7 degrees C.
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