Based on a lowly-doped (0.12 at. %) Pr3+:YLF crystal, high-power continuous-wave (CW) lasers at 639 nm were obtained by laser-diode (LD) pumping. A maximum output power of 8.14 W with a total slope efficiency of 51.5% was achieved for the quasi-fundamental (or called quasi-zero-order Laguerre-Gaussian (${\mathit{LG}}_0^0)$) mode laser. A laser beam with a conventional Gaussian distribution was obtained for the first time at ~ 7 W output power level (the M² factors were 3.3 and 1.1 in the horizontal and vertical directions, respectively). CW vortex lasers (${\mathit{LG}}_0^{+1}$ and ${\mathit{LG}}_0^{-1}$) with a maximum output power of 6.03 W were achieved by off-axis pumping. The total slope efficiency of the vortex laser was 56.3%. To the best of our knowledge, the output powers of the two types of lasers are the highest to date. Furthermore, theoretical models were built to explain the input–output power characteristics of the results and provide guidance to design high-power Laguerre-Gaussian lasers.

基于低掺杂（0.12 at。％）Pr3 +：YLF晶体，通过激光二极管（LD）泵浦获得了639 nm的高功率连续波（CW）激光器。准基本（或称为准零阶Laguerre-Gaussian（${\mathit{LG}}_0^0）$）模式的激光。首次获得具有传统高斯分布的激光束，输出功率约为〜7 W（水平和垂直方向的M ²因子分别为3.3和1.1）。连续波涡旋激光器（${\mathit{LG}}_0^{+\mathrm{1个}}$ 和 ${\mathit{LG}}_0^{--\mathrm{1个}}$）通过离轴泵浦获得最大输出功率为6.03 W. 涡旋激光器的总斜率效率为56.3％。据我们所知，这两种激光器的输出功率是迄今为止最高的。此外，建立了理论模型来解释结果的输入-输出功率特性，并为设计高功率Laguerre-Gaussian激光器提供指导。