Performance of Q-switched fiber laser using optically deposited reduced graphene oxide as saturable absorber

Yap, Yuenkiat and Chong, Wu Yi and Razgaleh, S. A. and Huang, Nayming and Ong, Chinkhai and Ahmad, H. (2022) Performance of Q-switched fiber laser using optically deposited reduced graphene oxide as saturable absorber. Fiber and Integrated Optics, 41 (1-2). pp. 26-40. ISSN 0146-8030, DOI

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Graphene is one of the most attractive two-dimensional nanomaterials widely used as saturable absorber for pulsing laser, owing to its unique non-linear optical responses. However, fabrication and integration of graphene saturable absorber into a laser cavity involves complex processes and procedures. Mass production of graphene-based saturable absorbers requires simplification of the fabrication process with minimum material wastage. Reduced graphene oxide, a functionalized graphene, is found to have saturable absorption property as well. Comparatively, it is easier and more cost-effective to produce. On the other hand, optical deposition is a saturable absorber deposition technique that maximizes material utilization. In this work, commercially available reduced graphene oxide in N-methyl-2-pyrrolidone was used to fabricate a saturable absorber device via optical deposition, due to its simplicity and high efficacy. Optical pulse generation via Q-switching were successfully demonstrated with the optically deposited rGO-SA incorporated into a ring erbium-doped fiber laser. Pulse repetition rate of up to similar to 85.0 kHz and pulse durations as short as similar to 2.0 mu s were achieved. Its performance as a saturable absorber in a Q-switched fiber laser is then compared with previous works. Comparatively, optically deposited rGO has a much lower Q-switched threshold and holds huge potential for mass production with maximum material utilization.

Item Type: Article
Funders: Ministry of Education of Malaysia, under the Fundamental Research Grant Scheme (Grant No: FRGS/1/2018/STG02/HWUM/ 02/2)
Uncontrolled Keywords: Reduced graphene oxide; Nanomaterials; Fiber laser; Q-switched
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Deputy Vice Chancellor (Research & Innovation) Office > Photonics Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 25 Oct 2023 02:14
Last Modified: 25 Oct 2023 02:14

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