An Axicon-Based Annular Pump Acousto-Optic Q-Switched Nd:GdVO4 Self-Raman Vortex Laser

被引:7
作者
Liu, Jie [1 ]
Duan, Yanmin [1 ,2 ]
Mao, Wenjie [1 ]
Jin, Xinxin [1 ,2 ]
Li, Zhihong [1 ,2 ]
Zhu, Haiyong [1 ,2 ]
机构
[1] Wenzhou Univ, Wenzhou Key Lab Micronano Optoelect Devices, Wenzhou 325035, Peoples R China
[2] Zhejiang Int Sci Tech Cooperat Base Photoelect Fun, Wenzhou 325035, Peoples R China
基金
中国国家自然科学基金;
关键词
vortex laser beam; annular pump; acousto-optic Q-switched; self-Raman laser; ORBITAL ANGULAR-MOMENTUM; DIRECT GENERATION; BEAMS; BESSEL; LIGHT;
D O I
10.3390/cryst13101484
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
We report, for the first time, the generation of a 1173 nm acousto-optic Q-switched self-Raman vortex laser with an axicon-based annular pump system. A 20 mm long Nd:GdVO4 crystal was used as the self-Raman crystal. Both the fundamental field and the first-Stokes field were investigated using the respective output couplers. In comparison with both vortex fields, a noticeable beam cleaning-up effect and pulse compression were observed from the 1063 nm fundamental field to the 1173 nm first-Stokes field. A Stokes field carrying a unitary topological charge was achieved. Finally, the average output power of the first-Stokes vortex emission reached 454 mW under an incident pump power of 19.5 W, corresponding to a pulse width of 45.7 ns. It was beneficial to apply a high peak power from the Q-switched laser and self-Raman conversion to expand the applications of the vortex laser beam.
引用
收藏
页数:10
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