全光纤激光器实现kW级功率输出

kW level fiber laser in all-fiber format

搭建了一台全光纤结构的光纤激光器。采用双端泵浦结构,共有36个泵浦输入端。在使用其中的24个泵浦输入端,泵浦功率为1 477 W时,获得了1 008 W高功率输出,光光转换效率为68%。输出激光的中心波长为1 082 nm,半波全宽为3 nm。目前激光器输出功率受限于泵浦功率,增加泵浦源的数目有望进一步提高输出功率。

We report a high-power fiber laser in all-fiber format.The system consists of 36 pump ports,both counter and forward pump configuration are employed.In the experiment,1 008 W fiber laser is obtained when 24 pump ports are employed with a total pump power of 1 477 W.The optical-to-optical conversion efficiency is 68%.The central wavelength of the output laser is 1 082 nm with a 3 dB bandwidth of 3 nm.Presently,the output power is limited by the pump source.It can be predicted that the laser power can be further scaled if more pump sources are employed.