Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 35, Issue 19, Pages 4120-4124Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2017.2726138
Keywords
Q switched diode pump solid state laser; radio frequency magnetron sputtering deposition; tungsten Disulfide
Funding
- Hong Kong Innovation and technology fund [GHP/007/14SZ]
- PolyU [K-ZP64]
- Shenzhen-Hong Kong Innovation Cooperation Project [SGLH20150205162842428]
- National Natural Science Foundation of China [61575167]
- Research Grants Council of Hong Kong, China [GRF 152109/16E PolyU B-Q52T]
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WS2 layered 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: YVO4 laser operating at 1064 nm was first demonstrated by using layered tungsten disulfide WS2 saturable absorber SA, which was fabricated by using radio frequency magnetron sputtering method. The fabricationmethod 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: YVO4 laser 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 mu s and single pulse energy of 145 nJ. This result proves the promising Q-switching performance of the fabricated WS2-SA.
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