中文摘要：

采用光强分布为环形的半导体激光器端面抽运YbGdYCOB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3．2 W时，最大输出功率为281 mw，光-光转换效率为8．7％，斜率效率为21．7％。

英文摘要：

With the YbGdYCOB crystal end-pumped by a diode laser with an annular-shaped beam profile, thedirect emission of vortex laser is realized in a laser resonant cavity. By measuring the spatial intensity distribution,beam quality factor, beam purity, and wave front phase information, it is confirmed that the laser output beam isreally a highly pure vortex beam. With 3.2 W pump power, the maximum output power is 281 mW, the optical-to-optical efficiency is 8.7%, and the slope efficiency is 21.7%.