A Graphene-Based Passively Q-Switched Ho:YAG Laser

被引：13
|
作者：
Yao Bao-Quan [1 ]
Cui Zheng [1 ]
Duan Xiao-Ming [1 ]
Shen Ying-Jie [1 ]
Wang Ji [1 ]
Du Yan-Qiu [1 ]
机构：
[1] Harbin Inst Technol, Natl Key Lab Tunable Laser Technol, Harbin 150001, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2014年 / 31卷 / 07期
基金：
中国国家自然科学基金;
关键词：
ABSORPTION;
D O I：
10.1088/0256-307X/31/7/074204
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A 2.09-mu m in-band pumped passively Q-switched Ho: YAG laser is demonstrated. Single layer graphene deposited on a quartz substrate is used as the saturable absorber for the Q-switched operation. The minimum pulse width of 2.11 mu s is obtained at an average output power of 100mW, corresponding to a pulse repetition frequency of 57.1 kHz and the pulse energy of 1.75 mu J. The beam quality factors M-2 of the Q-switched laser are 1.18 and 1.22 in the horizontal and longitudinal direction, respectively. The optical-to-optical conversion efficiency of the passively Q-switched laser is 4.3%, which is the highest conversion efficiency in the 2 mu m wavelength, to the best of our knowledge. It shows clearly that the Ho: YAG crystal is a potential gain medium in the 2 mu m range for the graphene application.
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收藏
页数：4
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