高功率散热技术及高功率光纤激光放大器  

Cooling Technology of High-Power and High-Power Fiber Laser Amplifier

作　　者：代守军[1,2] 何兵(指导)[1] 周军[1] 赵纯[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海市全固态激光器与应用技术重点实验室,上海201800 [2]中国科学院大学,北京100049

出　　处：《中国激光》2013年第5期13-18,共6页Chinese Journal of Lasers

基　　金：国家科技重大专项(2010ZX04013);国家863计划(2011AA030201);国家自然科学基金(60908011;60907045);上海市青年科技启明星计划(12QH1401100)资助课题

摘　　要：双包层光纤涂覆层的热损伤是高功率连续光纤激光器运转的主要限制因素之一。对高功率连续光纤激光器中的热效应进行研究,并对于仅由于涂覆层的热损伤引起的功率极限给出了理论模拟。进行了千瓦级光纤激光器中无源光纤与增益光纤熔点冷却的理论与实验研究。对于不同的冷却结构分别测量光纤与热沉之间的热接触电阻,并提供了有效的散热方案实现热量的有效传导。采用新型散热技术,基于主振荡功率放大(MOPA)结构,研制出1080nm 1.11kW全光纤激光器样机。放大级抽运光注入处熔点表面最大温度为327K(54℃),运行过程中没有非线性效应和热损伤现象出现。Double-clading fiber coating thermal damage is one of the prime limiting factors for the operation of high- power continuous-wave （CW） fiber lasers. The thermal effects in high power CW fiber lasers are studied, and the maximum output power of fiber lasers limited by the thermal degradation of coatings is theoretically simulated. Theoretical and experimental studies of splice points cooling in 1 kW CW fiber lasers are presented. Thermal contact resistances between the fiber and its heat sink are measured separately for different geometries and efficient cooling methods to achieve effective heat conduction are proposed. By using these optimized methods, based on the master oscillator power amplifier （MOPA） architecture, a 1080 nm 1. 11 kW all-fiber laser prototype is obtained. The maximum surface temperature at the pump light launching end splice of the booster amplifier is 327 K （54℃ ）. Moreover, thermal or nonlinear effects have not been observed during operation.

关 键 词：激光器 光纤激光放大器 热接触电阻 高功率 

分 类 号：O436[机械工程—光学工程]