中国激光, 2020, 47 (5): 0501005, 网络出版: 2020-05-12   

通过优化损耗点镜产生高效率的涡旋光束 下载: 1091次

High Efficiency Vortex Beam Generation by Optimization of Defect-Spot Mirror
作者单位
1 四川大学电子信息学院, 四川 成都 610064
2 华北光电研究所, 北京 100015
摘要
通过使用带有损耗点的腔镜,在Yb∶phosphate(Yb∶QX)振荡器里实现了一阶涡旋光束的输出。详细研究了涡旋光的光-光转换效率与损耗点直径和腔内激光模式直径及形状的关系。实验发现,在Z字型固体激光器中,当腔内激光模式直径为损耗点直径的4~6倍,激光模式在切线面和弧矢面的光斑直径比例(即椭圆率)约为80%,泵浦功率为1.59 W时,获得了光-光转换效率最高为7.7%的一阶涡旋光束。此研究可为利用损耗点在Z字型固体激光器中产生高转换效率的一阶涡旋光束提供理论实验依据。
Abstract
Herein, the first-order vortex beam was generated from Yb∶phosphate (Yb∶QX) oscillator possessing defect-spot mirror. Moreover, the relationships among the optical-to-optical conversion efficiency of the vortex beam, defect-spot diameter, and laser mode diameter and shape inside the cavity were minutely evaluated. Results indicate that in Z-shaped solid-state lasers, when the diameter of laser mode inside the cavity is approximately 4--6 times the defect-spot diameter, the ratio of the laser spot diameter in the tangent and sagittal planes (i.e., ellipticity) is approximately 80%, and the pump power is 1.59 W, the first-order vortex beam with the highest optical-to-optical conversion efficiency of 7.7% is obtained. This study can provide a theoretical and experimental basis for generating first-order vortex beam with high conversion efficiency in Z-shaped solid-state lasers using defect-spot.

李平, 张澍霖, 汪莎, 冯国英, 周寿桓. 通过优化损耗点镜产生高效率的涡旋光束[J]. 中国激光, 2020, 47(5): 0501005. Ping Li, Shulin Zhang, Sha Wang, Guoying Feng, Shouhuan Zhou. High Efficiency Vortex Beam Generation by Optimization of Defect-Spot Mirror[J]. Chinese Journal of Lasers, 2020, 47(5): 0501005.

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