Threshold decrease and output-power improvement in dual-loss Q-switched laser based on a few-layer WTe2 saturable absorber

被引：1
|
作者：
Wang J. [1 ]
Liu S. [1 ]
Pang J. [2 ]
Song P. [1 ]
Tang W. [1 ]
Ren Y. [1 ]
Xia W. [1 ]
机构：
[1] School of Physics and Technology, University of Jinan, Jinan
[2] Collab. Innov. Ctr. of Technol. and Equip. for Biol. Diagn. and Therapy in Universities of Shandong, Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Shandong Province, Jinan
来源：
| 1600年 / IOP Publishing Ltd卷 / 13期
关键词：
Q switching - Tungsten compounds - Tellurium compounds - Q switched lasers;
D O I：
10.35848/1882-0786/ab8279
中图分类号：
学科分类号：
摘要：
A dual-loss Q-switched laser was realized by applying a home-made 2.5 nm thick WTe2 to an acousto-optic modulated laser. Besides conventional pulse compression, the inclusion of WTe2 could obviously improve the average output power by 29.6% and reduce the laser threshold by 20%, even with the introduced 8% nonsaturable loss. The average output-power improvement and pulse compression in this dual-loss modulated laser resulted in a 113.7% increase of peak power. According to the measured spectra of the laser and the photoluminescence of WTe2, the laser-induced excitonic light emission may be the reason for this laser's gain. © 2020 The Japan Society of Applied Physics.
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