全固态超强超短激光技术的发展为人类开展科学研究提供了全新的实验手段与极端的物理条件，是当前非常重要的科学前沿领域之一，这就为具有宽光谱性能的激光材料的发展带来了新的机遇。本项目提出在具有宽光谱性能的稀土离子（Nd3+、Yb3+、Er3+等）掺杂碱土氟化物（CaF2、SrF2、BaF2等）激光材料（单晶和多晶）中，通过掺入非活性离子M+或Me3+（M=Na, K等；Me=Y, Sc, La, Gd等），在微观尺度上有意识地设计和控制稀土离子的局域配位结构，实现材料吸收、发射光谱性能以及激光性能的调控；建立稀土离子晶格局域结构与光谱参数之间相互关系的理论体系，深入地揭示局域结构对光谱与激光性能的影响规律与机理，在一定范围内实现根据激光性能的要求进行激光材料的结构设计。在此基础上，研制出可用于全固态超强超短前沿激光技术和满足国家战略需求的激光材料。

All-solid-state ultra-intense and ultra-short laser has been one of the most important science frontier fields, which provide us the new experimental means and extreme physical conditions in the fundamental science research. In this project, we hope to realize the controlled spectra properties and laser performances in the rare-earth ions (Nd3+, Yb3+, Er3+, etc.) doped alkaline-earth fluoride single crystals or polycrystalline materials(CaF2, SrF2, and BaF2), which usually have very broadband absorption and emission bands. Codoping non-active monovalent alkaline metal ions (Na+ or K+) or trivalent rare-earth ions (Y, Sc, La, Gd, etc.) will be used to modulate the local coordination structure of active ions in alkaline-earth fluoride. Then, the spectra properties and laser performance of the laser materials will be controllable. The experimental and theoretical system on the relationship between the local micro-structure and performances will be established, in order to discover the influence of local micro-structure on the spectra properties and laser performances of the laser materials, including single crystals and polycrystalline materials. Then, we can design the components and structure of laser materials to meet with the key requirements of lasers in the certain scope. Finally, new laser materials can be developed for the application in the international frontier all-solid-state ultra-intense and ultra-short laser technology and the country's strategic laser engineering.