Graphene-PVA saturable absorber for generation of a wavelength-tunable passively Q-switched thulium-doped fiber laser in 2.0 µm

Ahmad, Harith and Samion, Muhamad Zharif and Sharbirin, Anir Syazwan and Norizan, Siti Fatimah and Aidit, Siti Nabila and Ismail, Mohammad Faizal (2018) Graphene-PVA saturable absorber for generation of a wavelength-tunable passively Q-switched thulium-doped fiber laser in 2.0 µm. Laser Physics, 28 (5). 055105. ISSN 1054-660X

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Official URL: https://doi.org/10.1088/1555-6611/aab2cc

Abstract

Graphene, a 2D material, has been used for generation of pulse lasers due to the presence of its various fascinating optical properties compared to other materials. Hence in this paper, we report the first demonstration of a thulium doped fiber laser with a wavelength-tunable, passive Q-switched output using a graphene-polyvinyl-alcohol composite film for operation in the 2.0 μm region. The proposed laser has a wavelength-tunable output spanning from 1932.0 nm to 1946.0 nm, giving a total tuning range of 14.0 nm. The generated pulse has a maximum repetition rate and average output power of 36.29 kHz and 0.394 mW at the maximum pump power of 130.87 mW, as well as a pulse width of 6.8 μs at this pump power. The generated pulses have a stable output, having a signal-to-noise ratio of 31.75 dB, and the laser output is stable when tested over a period of 60 min. The proposed laser would have multiple applications for operation near the 2.0 micron region, especially for bio-medical applications and range-finding.

Item Type: Article
Uncontrolled Keywords: Average output power; Biomedical applications; Maximum pump power; Multiple applications; Passively Q-switched; Polyvinyl alcohol composite; Thulium-doped fibers; Wavelength tunable
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Photonics Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 07 Oct 2019 01:51
Last Modified: 07 Oct 2019 01:51
URI: http://eprints.um.edu.my/id/eprint/22663

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