采用光强分布为环形的半导体激光器端面抽运Yb…GdYCOB晶体,实现了激光谐振腔直接发射涡旋激光。通过测量输出激光光束的空间强度分布、光束品质因子、光束纯度以及光束的波前相位信息,证实激光器输出的光束为高纯度涡旋光束。当抽运功率为3.2W时,最大输出功率为281mW,光-光转换效率为8.7%,斜率效率为21.7%。 The laser beam is emitted directly from the laser cavity by pumping the Yb ... GdYCOB crystal on the end face of a semiconductor laser with a light intensity distribution. By measuring the spatial intensity distribution of the output laser beam, the beam quality factor, the beam purity and the wavefront phase information of the beam, it is confirmed that the laser output beam is a high-purity vortex beam. When the pumping power is 3.2W, the maximum output power is 281mW, the light-to-light conversion efficiency is 8.7% and the slope efficiency is 21.7%.