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Mechanically deposited tungsten disulfide saturable absorber for low-threshold Q-switched erbium-doped fiber laser


Citation

Lau, Kuen Yao and Abd Latif, Amirah and Abu Bakar, Muhammad Hafiz and Muhammad, Farah Diana and Omar, Muhammad Firdaus and Mahdi, Mohd Adzir (2017) Mechanically deposited tungsten disulfide saturable absorber for low-threshold Q-switched erbium-doped fiber laser. Applied Physics B: Lasers and Optics, 123 (8). art. no. 221. pp. 1-12. ISSN 0946-2171; ESSN: 1432-0649

Abstract

In this paper, we report a Q-switched erbium-doped fiber laser incorporating tungsten disulfide (WS2) as the saturable absorber. A direct mechanical deposition technique using a scotch tape is employed to place the WS2 powder onto the tip of a fiber ferrule. Several runs of mechanical extraction are performed to reduce the thickness of WS2 powder on the fiber tip. The fabricated WS2 saturable absorber exhibits a saturation intensity of 548.6 MW/cm2, modulation depth of 4.1% and non-saturable loss of 67.8%. A ring cavity erbium-doped fiber laser integrating the WS2 saturable absorber yields continuous wave lasing and Q-switching threshold at pump power of 10 and 12.7 mW, respectively. This Q-switching pump power threshold is the lowest to the best of the authors’ knowledge. The proposed technique of direct mechanical deposition is inexpensive, significantly faster and simpler compared to previously reported methods.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Faculty of Science
DOI Number: https://doi.org/10.1007/s00340-017-6790-z
Publisher: Springer
Keywords: Tungsten disulfide; Saturable absorber; Q-switched; Erbium-doped fiber laser
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 08 Jan 2020 06:01
Last Modified: 08 Jan 2020 06:01
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s00340-017-6790-z
URI: http://psasir.upm.edu.my/id/eprint/62380
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