位于560-590nm波段的黄光激光在钠信标、生物医学、原子光钟等领域具有重大应用需求，可实现LD直接泵浦全固态黄光激光输出是目前激光晶体的研究前沿之一。本项目在前期工作基础上，针对目前具有应用潜力的560-590nm波段掺Dy3+氟化物晶体材料，提出并研究：1）基于局域配位结构调控的思想，通过共掺调剂离子Me3+(Me=Y,La,Gd等)实现Dy3+局域配位结构的有效调控，调控光谱性能、获得560-590nm波段具有大的荧光分支比；2）共掺去激活离子Tb3+解决Dy3+（4F9/2→6H13/2）四能级系统激光通道下能级的阻塞。有效解决现有掺镝（Dy）激光晶体输出效率低（13.4%）等问题，发展具有自主知识产权和应用前景的560-590nm新型黄光波段的激光晶体。

Yellow lasers, operating during 560-590nm wavelength, have great potential applications in Sodium Guide Star Technology, Biomedicine and optical clocks based on Yb atoms etc. Diode-pumped solid-state laser with yellow laser output belongs to the research front of laser crystals. Based on the previous work, Dy-doped fluoride crystals which have potential applications at 560-590nm laser will be studied in this project. The main contents are listed as follow: 1) modulating the local coordination structure of Dy3+ ions in fluoride crystal lattice by co-doping buffer ions Me3+ (Me=Y, La, Gd et. al.), regulating the spectroscopic properties of Dy3+ ions, and obtaining Dy-doped fluoride crystals with high fluorescence branch ratio at 560-590nm wavelength. 2) overcoming the self-terminating "bottleneck" effect of the lower laser level in the four-level laser system of Dy3+ (4F9/2-6H13/2) by decreasing the lifetime of lower laser level 6H13/2 with co-doping with de-excitation ions Tb3+. We will solve the serious problem of Dy3+ laser with very small laser slope efficiency value (13.4%) and develop valuable 560-590nm yellow laser crystals with independent intellectual property rights.