Highly efficient solid-state vortex laser in a robust and simple configuration

被引:1
|
作者
Zhou, Wei [1 ,2 ]
Bao, Yushuo [2 ]
Xu, Haowen [1 ,2 ]
Liu, Jun [2 ]
Cai, Yi [1 ]
Xu, Shixiang [1 ]
Fan, Dianyuan [2 ]
机构
[1] Shenzhen Univ, Coll Phys & Optoelect Engn, Key Lab Optoelect Devices, Minist Educ & Guangdong Prov,Shenzhen Key Lab Mic, Shenzhen 518060, Peoples R China
[2] Shenzhen Univ, Minist Educ, Inst Microscale Optoelect, Int Collaborat Lab Mat Optoelect Sci & Technol2D, Shenzhen 518060, Peoples R China
来源
OPTICS EXPRESS | 2024年 / 32卷 / 14期
关键词
ORBITAL-ANGULAR-MOMENTUM; TOPOLOGICAL CHARGE; GENERATION; MODES; BEAMS; POLARIZATION;
D O I
10.1364/OE.528667
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Vortex beams, known as a typical form of structured light, possess numerous applications in various fields. Their widespread application prospects have then sparked an in-depth analysis of the generation and manipulation of vortex modes in an active cavity, as well as the development of high-performance vortex lasers. In this paper, we report on a new class of highly efficient and high-power Nd:YAG vortex lasers in a robust and compact configuration, which allows direct generation of vortex beams with an easily controllable topological charge both in the continuous-wave and pulsed operation regimes. The on-demand generation of intracavity vortex modes is realized based on a Q-plate by controlling the geometric phase inside the laser resonator. The maximum output power in the continuous-wave regime is 4.11 W with a slope efficiency of 37.9%. Besides, the vortex pulses are also achieved by including a Cr:YAG crystal in the cavity as a saturable absorber. The shortest pulse width is 142.8 ns at a pulse repetition rate of 232.6 kHz, with a maximum average output power of 1.05 W. Vortex modes with other topological charges can be obtained by simply changing the corresponding Q-plate without sacrificing the lasing efficiency. The experimental results can shed some light on the design and building of highly efficient and high-power vortex lasers together with a well-defined controllable topological charge, aiming at some specific applications.
引用
收藏
页码:24156 / 24165
页数:10
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