5kW全光纤结构1018nm激光合成

5kW all-fiber 1018nm laser combining

光纤激光同带抽运方案具有泵浦亮度高、量子亏损小等优势,有着巨大的功率提升潜力,是近年来国际上的研究热点。1018nm光纤激光可作为高功率掺镱光纤激光器的高效同带抽运源,但是单个1018nm光纤激光器输出功率有限,光束合成是突破这一局限的重要方案。基于19台单模1018nm光纤激光器和一个19×1光纤功率合束器,搭建了一套全光纤结构激光合成系统,实现了5kW的1018nm合成激光输出。

The scheme of tandem pumping has drawn a lot of interest in fiber laser field for their outstanding characteristics,which include high-brightness,low quantum defect,and great potential for power scaling.The 1018 nm laser can be used as an efficient tandem pumping source for high-power ytterbium fiber laser,but it is difficult to improve signal fiber laser output power.One of the efficiency methods to break through this limitation is beam combining.In this paper,based on 19 single-mode1018 nm fiber lasers and a 19×1 fiber combiner,we setup an all-fiber schematic laser combining system,and achieve 5 kW laser output with 1018 nm.