稀土掺杂紫外上转换材料及激光器研究进展  

Research Progress on Rare-Earth-Doped Ultraviolet Upconversion Materials and Lasers

作　　者：王淏宇 乔旭升[1] 樊先平[1] Wang Haoyu;Qiao Xusheng;Fan Xianping(School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China)

机构地区：[1]浙江大学材料科学与工程学院,浙江杭州310027

出　　处：《激光与光电子学进展》2022年第15期176-191,共16页Laser & Optoelectronics Progress

摘　　要：稀土离子具有独特的阶梯状能级,在上转换发光领域备受瞩目。稀土掺杂紫外上转换材料是实现紫外短波长紧凑激光器的有效途径。但在稀土离子的紫外上转换过程中,会产生大量非必要的能量损耗,导致紫外高阶上转换效率极低。因此,大功率的紫外上转换激光难以获得,紫外上转换激光器的实际应用受到限制。通过降低基质声子能、调控基质微观结构、改进泵浦方式、调整激光谐振腔形貌等方式,可以有效调控紫外上转换过程中的能量传递,提高紫外上转换激光的效率。本文综述了上转换发光的基本原理、紫外上转换发光材料的构成、增强紫外上转换发光的策略,以及紫外上转换激光器研究的最新进展。Rare-earth ions with unique stepped energy levels have attracted considerable attention in the field of upconversion luminescence. Rare-earth-doped ultraviolet upconversion materials are effective in realizing ultraviolet shortwavelength compact lasers. However, substantial energy loss occurs in the ultraviolet upconversion process of rare-earth ions, resulting in extremely low ultraviolet upconversion efficiency. Therefore, manufacturing high-power ultraviolet upconversion lasers is difficult, and the practical application of ultraviolet upconversion lasers is limited. By reducing the matrix phonon energy, regulating the matrix microstructure, improving the pumping mode, and adjusting the laser resonator morphology, energy transfer during ultraviolet upconversion can be effectively regulated and the efficiency of ultraviolet upconversion laser can be improved. In this study, the principle of upconversion luminescence, composition of ultraviolet upconversion materials, strategies for enhancing ultraviolet upconversion luminescence, and recent advances in ultraviolet upconversion lasers are reviewed.

关 键 词：激光器 紫外上转换激光器 激光谐振腔 稀土 紫外上转换材料 核壳结构 

分 类 号：O756[理学—晶体学]