Zheng Yong-Xiang, Cui Jin-Ming, Ai Ming-Zhong, Qian Zhong-Hua, Cao Huan, Huang Yun-Feng, Jia Xiao-Jun, Li Chuan-Feng, Guo Guang-Can
Opt Express. 2021 Aug 2;29(16):24674-24683. doi: 10.1364/OE.433207.
We demonstrate a laser frequency stabilization method with large tuning range to stabilize a UV laser by installing piezoelectric ceramic actuators into a Fabry-Pérot cavity with an ultra-low expansion spacer. To suppress piezoelectric drift, a two-layer symmetrical structure is adopted for the piezoelectric actuator, and a 14.7 GHz tuning range is achieved. The short-term drift of the piezoelectric ceramics caused by temperature and creep is eliminated, and the long-term drift is 0.268 MHz/h when the Fabry-Pérot cavity is sealed in a chamber without a vacuum environment. The long-term frequency drift is mainly caused by stress release and is eliminated by compensating the cavity voltage with an open loop. Without the need for an external reference or a vacuum environment, the laser frequency stabilization system is greatly simplified, and it can be extended to wavelengths ranging from ultraviolet to infrared. Owing to its simplicity, stability, and large tuning range, it is applicable in cold atom and trapped ion experiments.
我们展示了一种具有大调谐范围的激光频率稳定方法，通过将压电陶瓷致动器安装到带有超低膨胀间隔器的法布里 - 珀罗腔中来稳定紫外激光器。为了抑制压电漂移，压电致动器采用两层对称结构，实现了14.7 GHz的调谐范围。消除了由温度和蠕变引起的压电陶瓷的短期漂移，当法布里 - 珀罗腔密封在无真空环境的腔室中时，长期漂移为0.268 MHz/h。长期频率漂移主要由应力释放引起，通过开环补偿腔电压来消除。无需外部参考或真空环境，大大简化了激光频率稳定系统，并且它可以扩展到从紫外到红外的波长范围。由于其简单性、稳定性和大调谐范围，它适用于冷原子和囚禁离子实验。
