直接液体冷却薄片固体激光器研究进展

Advances in direct-liquid-cooled thin-disk solid-state laser

在高能固体激光器中,通常每增加一片增益介质都要增加与其对应的一整套冷却系统,随着高能固体激光器功率的进一步提高,激光器系统体积越来越庞大,并且对激光器的热管理提出了越来越高的要求。直接液体冷却薄片固体激光器因其优越的热管理及非常小的体积输出功率比,近年来成为新型固体激光器研究的热点。本文介绍了直接液体冷却薄片固体激光器概念的提出,阐述了该类激光器的特性,并提出了该类激光器的分类。分析了两类直接液体冷却薄片固体激光器的研究进展以及在获取高光束质量方面的技术挑战。

In high-energy solid lasers,a set of cooling system corresponding to each gain medium is usually added.With the further improvement of the power of high-energy solid lasers,the volume of the laser system becomes larger and larger,and higher and higher requirements are put forward for the thermal management of lasers.because of their excellent thermal management and very small volume output power ratio,direct-liquid-cooled thin-disk solid-state lasers have attracted considerable interests as novel laser sources.in the paper,the concept of direct-liquid-cooled thin-disk solid-state lasers is introduced,and the characteristics are presented,and the classification of such lasers is proposed.The latest progresses on two kinds of direct-liquid-cooled thin-disk solid-state lasers and the technical challenges in obtaining high beam quality are analyzed.