WS<sub>2</sub> as a saturable absorber for Q-switched 2&#x2009;&#x2009;micron lasers

Chao Luan; Kejian Yang; Jia Zhao; Shengzhi Zhao; Lei Song; Tao Li; Hongwei Chu; Junpeng Qiao; Chao Wang; Zhen Li; Shouzhen Jiang; Baoyuan Man; Lihe Zheng

doi:10.1364/OL.41.003783

Optics Letters
Vol. 41,
Issue 16,
pp. 3783-3786
(2016)
•https://doi.org/10.1364/OL.41.003783

WS₂ as a saturable absorber for Q-switched 2 micron lasers

Chao Luan, Kejian Yang, Jia Zhao, Shengzhi Zhao, Lei Song, Tao Li, Hongwei Chu, Junpeng Qiao, Chao Wang, Zhen Li, Shouzhen Jiang, Baoyuan Man, and Lihe Zheng

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Chao Luan, Kejian Yang, Jia Zhao, Shengzhi Zhao, Lei Song, Tao Li, Hongwei Chu, Junpeng Qiao, Chao Wang, Zhen Li, Shouzhen Jiang, Baoyuan Man, and Lihe Zheng, "WS₂ as a saturable absorber for Q-switched 2 micron lasers," Opt. Lett. 41, 3783-3786 (2016)

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Abstract

We prepared ${WS}_{2}$ nanosheets by using the thermal decomposition method and demonstrated for the first time its nonlinear saturable absorption property at around 2 μm. With the as-prepared ${WS}_{2}$ nanosheets as saturable absorber (SA), a passively Q-switched Tm:LuAG laser was realized successfully, and 660 ns laser pulses with an average output power of 1.08 W and pulse peak power of 26 W at a repetition rate of 63 kHz were obtained for an incident pump power of 7 W. Our experimental results definitely demonstrate that ${WS}_{2}$ could be a kind of promising SA for solid-state 2 μm lasers.

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SA	Laser Medium	Output Power(mW)	Pulse Width(ns)	Peak Power(W)	Ref.
${WS}_{2}$	Tm:LuAG	1080	660	26	This work
${MoS}_{2}$	${Tm}^{3 +}$ fiber	46	1760	0.57	[10]
${MoS}_{2}$	Tm:CLNGG	62	4840	0.15	[11]
${MoS}_{2}$	$Tm : {GdVO}_{4}$	100	800	2.6	[12]
${MoS}_{2}$	Tm,Ho:YGG	206	410	3.4	[13]
BP	Tm:YAG	38.5	3120	1.1	[24]
BP	${Ho}^{3 +}$ fiber	71.7	731	0.87	[25]
BP	Tm:YAP	3100	181	218	[26]

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