946 nm Nd: YAG double Q switched laser based on monolayer WSe2 saturable absorber

被引：40
作者：
Sun, Yanxiao [1 ]
Bai, Yang [1 ]
Li, Diao [1 ]
Hou, Lei [1 ]
Bai, Bing [1 ]
Gong, Yuze [1 ]
Yu, Leilei [1 ]
Bai, Jintao [1 ,2 ]
机构：
[1] Northwest Univ, Natl Key Lab Photon & Photon Technol, Xian 710069, Shaanxi, Peoples R China
[2] Northwest Univ, Coll Phys, Xian 710069, Shaanxi, Peoples R China
来源：
OPTICS EXPRESS | 2017年 / 25卷 / 18期
基金：
中国国家自然科学基金;
关键词：
TRANSITION-METAL DICHALCOGENIDES; CHEMICAL-VAPOR-DEPOSITION; CONTINUOUS-WAVE; NDYAG LASER; PULSE-WIDTH; MONO LAYER; PEAK-POWER; MOS2; WS2; ABSORPTION;
D O I：
10.1364/OE.25.021037
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper, we report a 946nm double Q-switched laser side pumped by an 808-nm pulse laser diode (LD). A layered tungsten diselenide (WSe2) saturable absorber (SA) together with an MgO doped LiNbO3 electro-optic (EO) modulator is applied to double Q-switch the Nd: YAG laser, producing trains of nanosecond-duration pulses with 500 Hz repetition rate. Such WSe2 saturable absorbers are fabricated by chemical vapor deposition (CVD) in a hot wall chamber and then embedded into a resonant mirror. The achieved pulse energy of double Q-switched laser at 946 nm is approximately 2.63 mJ with 10.8 ns pulse width and the peak power is round 244 kW, corresponding to the beam quality factors of M-x(2) = 3.846, M-y(2) = 3.861. Monolayer WSe2 nanosheets applied in the experiment would be a promising SA for passive Q-switching operation. (C) 2017 Optical Society of America
引用
收藏
页码：21037 / 21048
页数：12
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