小型化激光冷却镱离子微波频标关键技术研究

小型化高性能微波频标在航空航天、守时授时、国防建设等领域有重要应用，是具有战略意义的核心基础装备。为满足未来卫星导航、航空航天等重大需求，开展下一代小型化高性能频标的研究具有重要战略意义。综合分析国际各个研究方案可知，激光冷却Yb+离子频标性能高、可行性强，极有可能成为下一代主流小型化高性能频标。本项目围绕国家对高端时频装备的战略需求，跟踪国际研究热点与前沿，结合团队在激光冷却离子微波频标领域的研究基础和技术优势，针对提高Yb+离子频标的稳定度和准确度性能、实现小型化、促使其走向应用的关键科学问题，重点攻关大数目长寿命离子云陷俘、高效激光冷却、高可靠369nm激光器、369nm和935nm激光稳频等四项关键技术，促使激光冷却Yb+离子频标真正走向实用。研制小型化高性能Yb+离子频标可进一步打破西方国家对我国高端微波频标的技术封锁，解决高端时频装备“卡脖子”问题。

The miniaturized high-performance microwave frequency standard has important applications in satellite navigation, time keeping system, and national defense. It is a core basic equipment. In order to meet the major needs of the future satellite navigation and space application, it is of great strategic significance to carry out research on the next generation of miniaturized high-performance frequency standards. Based on the analysis of the frequency standards developed by the groups all over the world, the laser-cooled Yb + ion frequency standard is recognized to be high performance and strong feasibility, which could be the next generation of main miniaturized high-performance frequency standards. This project focuses on the country's strategic needs for high-end frequency standards, tracks international research frontiers, combines the team's own research foundation and technical advantages in the field of laser-cooled ion microwave frequency standards. The key scientific issues of this project are improve the stability and stability of laser-cooled Yb+ ion frequency standards, and to realize its miniaturization and practicality. And the key technologies of this project are large number ions trapping with long lifetime, efficient laser cooling, highly reliable 369 nm laser, and frequency stabilization of 369 nm and 935 nm lasers. Developing the laser cooling Yb + ion frequency standard and Promoting it to be practical can further break the technical blockade of high-end microwave frequency standards by the western countries, and solve the bottleneck problems in the high-end time-frequency equipment.