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Molybdenum tungsten disulphide (MoWS2) as a saturable absorber for a passively Q-switched thulium/holmium-codoped fibre laser.
- Source :
-
Journal of Modern Optics . Jul2019, Vol. 66 Issue 11, p1163-1171. 9p. - Publication Year :
- 2019
-
Abstract
- In this work, a passively Q-switched Thulium/Holmium-doped fibre laser (THDFL) using a molybdenum tungsten disulphide (MoWS2) saturable absorber (SA) is proposed and demonstrated. The MoWS2 nanosheets are prepared by hydrothermal exfoliation and then suspended in a polyvinyl alcohol (PVA) thin film host. Q-switching of the THDFL at a maximum 1550 nm pump power of 445.2 mW gives a maximum repetition rate and minimum pulse width of 36.3 kHz and 2.8 µs with a corresponding pulse energy of 86.4 nJ and peak power of 31.1 mW. The MoWS2 based Q-switched THDFL's output has a very high signal-to-noise value of ∼62.2 dB which strongly indicates that the laser is working in a stable operation. To the best of our knowledge, this is the first demonstration of MoWS2 as a passive SA in a THDFL for operation in the 2.0 µm region. The proposed laser would have significant medical and sensing applications, particularly at the biologically active 2.0–2.1 µm regions. [ABSTRACT FROM AUTHOR]
- Subjects :
- *Q-switched lasers
*THULIUM
*TUNGSTEN
*MOLYBDENUM
*POLYVINYL alcohol
*LASERS
*FIBERS
Subjects
Details
- Language :
- English
- ISSN :
- 09500340
- Volume :
- 66
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Journal of Modern Optics
- Publication Type :
- Academic Journal
- Accession number :
- 136461232
- Full Text :
- https://doi.org/10.1080/09500340.2019.1609612