高热导率复合结构固体激光器技术研究

项目名称： 高热导率复合结构固体激光器技术研究

项目编号： No.61275136

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 唐玉龙

作者单位： 上海交通大学

项目金额： 76万元

中文摘要： 在单激光模块中实现基模、高功率激光输出是高功率固体激光技术发展的基础。由于现在使用的激光材料的热导率不高，单纯依靠采用如薄片/光纤等大表面-体积比的结构来提高激光功率面临着新的挑战。本项目提出具有高热导率的固体激光器复合结构，利用高热导率材料（如SiC、金刚石等）与激光增益介质（如晶体、陶瓷等）的一体化设计和复合技术，将优异的散热性能、高强度泵浦技术和大模场体积结合起来，大幅度提升固体激光器的散热能力，解决高功率固体激光器的热畸变、光束质量劣化和效率下降等关键技术问题，在单激光模块中实现高功率基模激光输出，探索出一条高光束质量、高平均功率的固体激光器新技术途径。

中文关键词： 高热导率；固体激光器；复合结构；碳化硅；

英文摘要： High-power fundamental-mode laser module is the foundation of developing specially-high-power solid-state laser technology. In conventional solid-state lasers, the laser material usually has a comparatively low thermal conductivity. Therefore, the laser-power scaling technique based on simply increasing surface-volume ratio (disk or fiber) is now facing many challeges. In this program, we propose and develop a composite solid-state laser technology based on high-conductivity materials. By adopting high-conductivity materials, such as SiC or diamond, as the heat dissipating material, we efficiently combine the laser gain material (crystal or ceramic) with the heat-dissipating material to realize a composite laser structure. With composite laser structures, we can combine the advantages of high-heat-dissipating features, high-pumping-density technique, and large-mode volume, thus greatly improve the heat-dissipating capability of the laser system. Through solving the key scientific and technical problems such as thermal distortion, beam-quality degrading, and laser efficiency dropping in high-power lasers, we will realize high-power fundamental-mode laser output from a single laser module, and develop a new technical routine to achieve high-power high-beam-quality solid-state lasers.

英文关键词： High conductivity；solid-state laser；composite structure；SiC；