最近 ,我们采用多模大功率半导体激光器泵浦掺Yb双包层D型光纤 ,获得了 1 0 9μm、功率为 7 4W的激光输出 .实验中采用线形腔结构 ,LD端面泵浦长 3 0m掺Yb双包层D型光纤 ,泵浦源为光纤 80 0 μm输出的 974nm激光 ,经过 1∶1成像系统后 ,再用聚焦镜聚焦到光纤上 .双包层光纤具? Recently, we used a multi-mode high-power semiconductor laser to pump a Yb-doped double-clad D-type optical fiber and obtained a laser output of 109 μm and a power of 74 W. In the experiment, a linear cavity structure was used, Yb double-clad D-type fiber, the pump source is a 974nm laser with a fiber output of 80 μm. After passing through a 1: 1 imaging system, it is focused by a focusing lens onto the fiber.