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Chin. Phys. B, 2017, Vol. 26(4): 044203    DOI: 10.1088/1674-1056/26/4/044203
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

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

Xi Wang(王茜)1,2, Lu Li(李璐)1,2, Jin-Ping Li(李金萍)3, Yong-Gang Wang(王勇刚)1,3
1 State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China
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

Cite this article: 

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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