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- Title
Low Threshold Q-switched Er-doped Fibre Laser (EDFL) Using SnS<sub>2</sub> as a Saturable Absorber (SA).
- Authors
JAFRY, A. A. A.; MAHYUDDIN, M. B. H.; ROSOL, A. H. A.; RUSDI, M. F. M.; LI, S.; HARUN, S. W.; KASIM, N.
- Abstract
The SnS2 possessing bandgap of 2 to 2.4 eV is compatible with the visible and ultraviolet (UV) emission spectrum; however, the imperfect crystal structure of SnS2- polyvinyl alcohol (PVA) has an adjustable sub-bandgap which was suitable for near-infrared (NIR) to mid-infrared (MIR) pulse generation. We, therefore, developed an in-house and employed SnS2-PVA as the saturable absorber (SA) inside an Er-doped fibre laser (EDFL) cavity to initiate Q-switching at 1557 nm, a pulse width as short as 7.05 µs which corresponded to a repetition rate of 69.44 kHz. The EDFL cavity initiated stable Q-switched pulses within pump power of 21 to 49 mW. At a maximum attainable pump power of 49 mW the laser cavity consumed a maximum output power of 5.28 mW which corresponds to a pulse energy of 76.04 nJ. The Q-switched EDFL was stable, exhibiting a signal-to-noise ratio (SNR) of 68.4 dB and a pump efficiency of 13.37%. Our Q-switched EDFL cavity was optimized as we captured stable Q-switching within a 1.55 µm region and, consequently, provided opportunities for laser commercialization in the area of micromachining and laser cutting.
- Subjects
FIBER lasers; FIBER optics; ULTRAVIOLET radiation; LASER cavity resonators; OPTICAL resonators
- Publication
International Journal of Laser Science: Fundamental Theory & Analytical Methods, 2021, Vol 2, Issue 3/4, p299
- ISSN
2474-4956
- Publication type
Article