,Precise calibration of zero-crossing temperature and drift of an ultralow expansion cavity with a c

• 作 者: Hui Liu Kun-Liang Jiang Jin-Qi Wang Zhuan-Xian Xiong Ling-Xiang He Bao-Long Lü
• 机 构: State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Phys
• 出 处: 中国物理B（英文版）
• 发表日期: 2018年5期
• 关键词: clock transition spectra ULE cavity frequency drift zero-crossing temperature

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 ℃.