Dual-wavelength Q-switched thulium doped fiber laser with TiO2 film saturable absorber
Document Type
Article
Publication Date
1-1-2018
Abstract
We report a dual-wavelength Q-switched Thulium doped fiber laser based on a Titanium dioxide (TiO2) saturable absorber. The TiO2 was embedded in polyvinyl alcohol (PVA) film, which was then sandwiched in between two fiber ferrules in the cavity. By using a Thulium-doped fiber with a slightly larger core, it functions as intra-cavity spectral filter to allow dual-wavelength Q-switching regime to be achieved in the cavity. Our experimental results show that the fiber laser can simultaneously generate Q-switched microsecond pulses at 1954.43 nm and 1957.27 nm, which have the repetition rate varying from 12.89 kHz to 21.93 kHz and 0.54 µJ maximum pulse energy. Our proposed scheme is quite simple and thus it can be implemented at a low cost.
Keywords
Q-switching, TiO2 saturable absorber, Thulium-doped fiber laser, Dual-wavelength laser
Divisions
fac_eng
Funders
Malaysian Ministry of Higher Education (Grant No. FRGS/1/2015/SG02/UITM/03/3),University of Malaya (Grant. No. FG006-17AFR)
Publication Title
Optoelectronics and Advanced Materials, Rapid Communications
Volume
12
Issue
5-6
Publisher
National Institute of Optoelectronics