LD-pumped high-power CW Pr3+:YLF Laguerre-Gaussian lasers at 639 nm

被引：33
作者：
Lin, Xiuji [1 ]
Chen, Mingpo [1 ]
Feng, Qichen [1 ]
Ji, Shuaihao [1 ]
Cui, Shengwei [2 ,3 ]
Zhu, Yao [1 ]
Xiao, Bo [1 ]
Li, Wensong [1 ]
Xu, Huiying [1 ]
Cai, Zhiping [1 ]
机构：
[1] Xiamen Univ, Dept Elect Engn, Xiamen 361005, Peoples R China
[2] Hebei Univ, Coll Phys Sci & Technol, Photon Informat Innovat Ctr, Baoding 071002, Peoples R China
[3] Hebei Univ, Coll Phys Sci & Technol, Hebei Prov Ctr Opt Sensing Innovat, Baoding 071002, Peoples R China
来源：
OPTICS AND LASER TECHNOLOGY | 2021年 / 142卷
基金：
中国国家自然科学基金;
关键词：
High-power lasers; Visible lasers; Vortex lasers; Pr3+:YLF lasers; DIRECT GENERATION; RED;
D O I：
10.1016/j.optlastec.2021.107273
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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 (LG(0)(0))) mode laser. A laser beam with a conventional Gaussian distribution was obtained for the first time at similar to 7 W output power level (the M-2 factors were 3.3 and 1.1 in the horizontal and vertical directions, respectively). CW vortex lasers (LG(0)(+1) and 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.
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页数：5
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