Generation Of Q-Switched Fiber Laser At 1.0-, 1.55-And 2.0-µM Employing A Spent Coffee Ground Based Saturable Absorber

Abdul Latiff, Anas and Mohd Rusdi, Muhammad Farid and Rosol, Ahmad Haziq Aiman and Harun, Sulaiman Wadi and Jafry, Afiq Arif Aminuddin and Kasim, Nabilah and Ab Rahman, Mohd Fauzi and Abdul Khudus, Muhammad Imran Mustafa and Ahmad, Harith (2021) Generation Of Q-Switched Fiber Laser At 1.0-, 1.55-And 2.0-µM Employing A Spent Coffee Ground Based Saturable Absorber. Optical Fiber Technology, 61. pp. 1-10. ISSN 1068-5200

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Abstract

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-µm 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- µm regions, respectively. The shortest pulse width of 4.80 µs and maximum pulse energy of 0.152 µJ 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
Uncontrolled Keywords:	Erbium-doped fiber, Fiber laser, Q-switching operation, Saturable absorber, Spent coffee ground, Thulium-doped fiber, Ytterbium-doped fiber
Divisions:	Faculty of Electronics and Computer Engineering
Depositing User:	Sabariah Ismail
Date Deposited:	28 Feb 2022 12:14
Last Modified:	28 Feb 2022 12:14
URI:	http://eprints.utem.edu.my/id/eprint/25516
Statistic Details:	View Download Statistic

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