高功率光纤激光器用双包层光纤参数设计

Parameters design of double clad fiber for high power fiber lasers

非线性效应(SBS、SRS)、光纤侧表面散热能力及光纤端面破坏等因素的存在限制了光纤激光器输出功率的进一步提高。为实现单纤千瓦级近衍射极限激光输出,大模面积双包层光纤(LMA DCF)的特性参数,包括纤芯及内包层直径、数值孔径、吸收系数、光纤长度等的设计至关重要。

There are lots of limits including optical nonlinear effects(SRS,SBS),optical and thermal damage for the power-scaling of a single-fiber laser configuration to an output power of 1 kW.In order to realize 1 kW output power with difffraction-limited beam quality,it's necessary to design the parameters of a LMA DCF carefully,such as inner-cladding diameter,core diameter,N.A,and fiber length.