Generation of Q-switched fiber laser at 1.0-, 1.55-and 2.0-mu m employing a spent coffee ground based saturable absorber

Rusdi, Muhammad Farid Mohd and Jafry, Afiq Arif Aminuddin and Latiff, Anas Abdul and Rosol, Ahmad Haziq Aiman and Ab Rahman, Mohd Fauzi and Kasim, Nabilah and Abdul Khudus, Muhammad Imran Mustafa Abdul and Ahmad, Harith and Harun, Sulaiman Wadi (2021) Generation of Q-switched fiber laser at 1.0-, 1.55-and 2.0-mu m employing a spent coffee ground based saturable absorber. Optical Fiber Technology, 61. ISSN 1068-5200, DOI

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Spent coffee ground (SCG) was demonstrated as saturable absorber (SA) for Wideband Q-switched fiber lasers generation. The SCG SA has a broad linear absorption that covers from 1000 nm to 2000 nm wavelength and a modulation depth of 30% at 1.55-mu m region. Through purification process, the finer SCG powder is obtained, and be embedded with a polyvinyl alcohol for thin film formation. To realize Q-switching operation lasers, a fabricated SCG film was integrated into three different fiber laser cavities including ytterbium-doped fiber laser, erbium-doped fiber laser, and thulium-doped fiber laser. A peak wavelength has obtainable at 1031 nm, 1563 nm, and 1976 nm for 1-, 1.55-, and 2- mu m regions, respectively. The shortest pulse width of 4.80 mu s and maximum pulse energy of 0.152 mu J are observed from the YDFL cavity. RF spectrum shows the signal-to-noise ratio for all regions is above 35 dB, indicates a stable pulsing generation. Our technique opens the door for unlimited materials SA from environmentally friendly resources which contribute to sustainable effort.

Item Type: Article
Funders: Centre for Telecommunication Research and Innovation (CeTRI), Universiti Teknikal Malaysia Melaka (UTeM), Universiti Malaya, Ministry of Education (MOE), Malaysia[R.J130000.7854.5F183], Universiti Teknologi Malaysia (UTM)[R.J130000.7854.5F183]
Uncontrolled Keywords: Q-switching operation;Ytterbium-doped fiber;Erbium-doped fiber;Thulium-doped fiber;Fiber laser;Saturable absorber; Spent coffee ground
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science
Depositing User: Ms Zaharah Ramly
Date Deposited: 16 Jun 2022 02:42
Last Modified: 16 Jun 2022 02:42

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