项目名称: YAG透明陶瓷中“晶界”对激光振荡的调控机理研究
项目编号: No.11274144
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 数理科学和化学
项目作者: 陈浩
作者单位: 江苏师范大学
项目金额: 86万元
中文摘要: 在透明激光陶瓷中,晶粒"晶界对激光振荡的影响"已经成为该领域十分重要的研究内容之一。本项目将以Ho:YAG透明激光陶瓷为增益介质,重点研究陶瓷晶粒的晶界对红外波段激光振荡的影响。申请人在前人研究的Nd:YAG等透明陶瓷的基础上,提出由于Ho在YAG中的有较大的"分凝系数"以及具有"准四能级系统"特性,使得其晶界对激光振荡影响的规律更趋复杂。申请人将在本项目中将探索Ho:YAG透明陶瓷中 "晶界偏析"现象引起的光学不均匀性对激光振荡的影响,以及晶界上Ho离子对"光电导"、"浓度猝灭"、"可饱和吸收缺陷"等现象的物理机理。申请人希望通过本项目的研究,能够实现通过控制晶界品质达到"调控"激光振荡的目的,为更好的制造与应用透明陶瓷材料,产生高品质激光输出探索理论和技术基础。
中文关键词: 透明陶瓷;Ho:YAG;晶界;激光材料;
英文摘要: For transparent laser ceramic, the effect of ceramic grain boundaries on laser oscillation has become a very important research topic. This project is about a study on the regulation mechanism of the grain boundary affecting laser oscillation in the Ho:YAG transparent ceramic, which is a gain material of 2 μm laser. Since the Ho has a high segregation coefficient and a quasi-4-energy level laser system in the YAG, we estimate the mechanism will become more complex and confusing in the Ho:YAG ceramic than in the Nd:YAG ceramic. In this application, we will explore how the optical nonuniform affects the laser operations and how the Ho ions in the grain boundary affect the photoconduction, concentration quenching, saturable absorber-type defects, etc. Those are caused by the gain boundary segregation. We wish to find a way to regulate and control the laser oscillation by controlling the grain boundary quality.
英文关键词: transparent ceramic;Ho:YAG;grain boundary;laser material;