Spectroscopy and efficient dual-wavelength laser performances of a Nd:GYSAG crystal

被引：5
作者：
Huang, Conghui [1 ,2 ]
Lin, Wenfang [1 ,2 ]
Fang, Qiannan [1 ,2 ]
Xu, Min [1 ,2 ]
Zhang, Shulong [1 ,2 ]
Tao, Siliang [1 ,2 ]
Li, Shanming [1 ,2 ]
Zhao, Chengchun [1 ,2 ]
Hang, Yin [1 ,2 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Adv Laser & Optoelect Funct Mat Dept, Shanghai 201800, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
来源：
OPTICS LETTERS | 2024年 / 49卷 / 11期
关键词：
Chromium compounds - Crystals - Emission spectroscopy - Pumping (laser) - Saturable absorbers;
D O I：
10.1364/OL.525380
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We reported on the spectral properties and dual -wavelength laser performances of a novel, to the best of our knowledge, Nd:Gd 1. 8 Y 1. 2 ScAl 4 O 12 (Nd:GYSAG) crystal for the first time. The absorption spectra, emission spectra, and fluorescence lifetime were systematically investigated. Further, a continuous -wavelength (CW) laser output power up to 5.02 W was obtained under an absorbed pump power of 9.45 W with slope and optical -to -optical efficiencies of 59.4% and 53.1%, respectively, at 1061.2 and 1063.2 nm. A stable passively Q -switched (PQS) laser employing Cr:YAG as a saturable absorber (SA) was realized. The maximum average output power of 0.756 W with a slope of near 34.4% was obtained with the pulse width, pulse energy, and peak power of 14.0 ns, 128.1 mu J, and 9.15 kW, respectively. The results indicate that the Nd:GYSAG crystal is an excellent laser medium for generating a high -efficiency dual -wavelength laser and has potential in terahertz (THz) laser generation. (c) 2024 Optica Publishing Group
引用
收藏
页码：2994 / 2997
页数：4
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