We report the direct generation of optical vortex arrays in a diode-pumped bulk Yb:CALGO laser. By adjusting the angles of the input mirror, output coupler and laser crystal to achieve off-axis-pumped condition, the ring-shaped LG_0,±1, two to six order vortex array have been obtained. The phase singularities of optical vortex arrays were tunable from 1 to 6. When the pump power was 13.41 W, the maximum output power of LG_0,±1, double-vortex array, three-vortex array and four-vortex array were 1.93 W, 1.5 W, 1.02 W and 0.79 W respectively. The chirality could be adjusted by rotating the output coupler. The topological charges of each phase singularity were determined by interference pattern. Theoretical simulation including intensity distribution, interference fringes and phase distribution have been analyzed. The simulations are in good accordance with experimental results.

中文翻译：

---

通过在全固态 Yb:CALGO 激光器中旋转直接生成光学涡流阵列

我们报告了在二极管泵浦体 Yb:CALGO 激光器中直接生成光学涡流阵列。通过调整输入镜、输出耦合器和激光晶体的角度，实现离轴泵浦条件，得到了环形LG _0,±1，二至六阶涡旋阵列。光学涡流阵列的相位奇点可在 1 到 6 范围内可调。当泵浦功率为 13.41 W 时，LG _0,±1的最大输出功率、双涡流阵列、三涡流阵列和四涡流阵列分别为 1.93 W、1.5 W、1.02 W 和 0.79 W。可以通过旋转输出耦合器来调整手性。每个相位奇点的拓扑电荷由干涉图决定。对包括强度分布、干涉条纹和相位分布的理论模拟进行了分析。模拟结果与实验结果吻合良好。