1.5-MHz repetition rate passively Q-switched Nd: YVO4 laser based on WS2 saturable absorber

doi:10.1088/1674-1056/26/4/044203

Abstract A transmission-type tungsten disulfide (WS₂)-based saturable absorber (SA) is fabricated and applied to passively Q-switched Nd:YVO₄ laser. The WS₂ nanosheets are deposited on a quartz substrate by the vertical evaporation method. By inserting the WS₂ SA into the plano-concave laser cavity, we achieve 153-ns pulses with an average output power of 1.19 W at 1064 nm. To the best of our knowledge, both of them are the best results among those obtained by the Q-switched solid-state lasers with WS₂-based absorbers. The repetition rate ranges from 1.176 MHz to 1.578 MHz. As far as we know, it is the first time that MHz level Q-switched pulses have been generated in all solid state lasers based on low-dimensional materials so far.

Keywords: Q-switched lasers solid-state lasers nonlinear optical materials

Received: 23 September 2016
Revised: 13 November 2016
Accepted manuscript online:

PACS:	42.60.Gd	(Q-switching)
	42.55.Xi	(Diode-pumped lasers)
	42.70.Nq	(Other nonlinear optical materials; photorefractive and semiconductor materials)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61378024).

Corresponding Authors: Yong-Gang Wang
E-mail: chinawygxjw@snnu.edu.cn

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Xi Wang(王茜), Lu Li(李璐), Jin-Ping Li(李金萍), Yong-Gang Wang(王勇刚) 1.5-MHz repetition rate passively Q-switched Nd: YVO₄ laser based on WS₂ saturable absorber 2017 Chin. Phys. B 26 044203

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1.5-MHz repetition rate passively Q-switched Nd: YVO4 laser based on WS2 saturable absorber

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1.5-MHz repetition rate passively Q-switched Nd: YVO₄ laser based on WS₂ saturable absorber