Passively Q-switched 1.3 mu m bismuth doped-fiber laser based on transition metal dichalcogenides saturable absorbers
Document Type
Article
Publication Date
3-1-2022
Abstract
In this work, Q-switched fiber laser has been demonstrated in a bismuth-doped fiber laser (BDFL) system using tungsten ditelluride (WTe2) and tungsten disulfide (WS2) as saturable absorbers (SAs). The solution casting method was used to prepare both WTe2 and WS2 thin films SAs. At the threshold pump power, the generation of Q-switched pulse using WTe2 SA resulted in a pulse width of 10.4 mu s and a repetition rate of 21.20 kHz. When the pump power was increased to maximum, the pulse width reduced to 8.0 mu s, while the repetition rates increased to 22.46 kHz. Similarly, a Q-switched pulse was generated using WS(2 )SA, with an initial repetition rate of 18.86 kHz and a pulse width of 14.4 mu s. The repetition rate of the pulses then increased to 19.53 kHz and pulse width reduced to 11.2 mu s with the increasing pump power. The maximum pulse energy obtained for WTe2 and WS2 SAs was 13.93 nJ and 11.36 nJ, respectively, with a maximum average output power of 0.313 mW (WTe2) and 0.222 mW (WS2). This work uses the transition metal dichalcogenides (TMDs) materials to generate Q-switched pulses in BDFL operating at 1.3 mu m region.
Keywords
Saturable absorber, Tungsten ditelluride, Tungsten disulfide, Q-switching, Bismuth-doped fiber
Divisions
photonics
Funders
Universiti Malaya [Grant No:RU005-2021],Universiti Malaya [Grant No:RK021-2019],Universiti Malaya [Grant No:TOP100PRC]
Publication Title
Optica Fiber Technology
Volume
69
Publisher
Elsevier Scince Inc
Publisher Location
STE 800, 230 PARK AVE, NEW YORK, NY 10169 USA