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). 055105-1. ISSN 1054-660X E-ISSN 1555-6611

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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 (Journal)
Additional Information:	7105/65537
Uncontrolled Keywords:	Graphene-PVA; Saturable absorber for generation of a wavelength-tunable; Q-switched thulium-doped; Fiber laser in 2.0 μm
Subjects:	Q Science > QC Physics Q Science > QD Chemistry T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Biomedical Science Kulliyyah of Science > Department of Physics
Depositing User:	Mrs Siti Fatimah Norizan
Date Deposited:	18 Feb 2019 11:56
Last Modified:	12 Jul 2019 16:48
URI:	http://irep.iium.edu.my/id/eprint/65537

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