Passively Q-Switched Nd:YVO4 Laser Using WS2 Saturable Absorber Fabricated by Radio Frequency Magnetron Sputtering Deposition

Chun Yin Tang, Ping Kwong Cheng, Lili Tao, Hui Long, Long Hui Zeng, Qiao Wen, Yuen Hong Tsang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

27 Citations (Scopus)


WS2layered material offers a great potential for the development of next generation laser photonic devices due to its strong layer absorption compared with graphene. The passively Q-switched Nd:YVO4laser operating at 1064 nm was first demonstrated by using layered tungsten disulfide WS2saturable absorber SA, which was fabricated by using radio frequency magnetron sputtering method. The fabrication method is scalable and capable of producing large size sample with high uniformity. Besides, the thickness of produced sample can be well-controlled by adjusting sputtering time. A stable Q-switched laser operation is achieved by using this home made few layers WS2-SA within a diode-pumped Nd:YVO4laser cavity. The maximum average output power obtained is 19.6 mW corresponding to a repetition rate of 135 kHz, a pulse duration of 2.3 μs and single pulse energy of 145 nJ. This result proves the promising Q-switching performance of the fabricated WS2-SA.
Original languageEnglish
Article number7976283
Pages (from-to)4120-4124
Number of pages5
JournalJournal of Lightwave Technology
Issue number19
Publication statusPublished - 1 Oct 2017


  • Q switched diode pump solid state laser
  • radio frequency magnetron sputtering deposition
  • tungsten Disulfide

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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