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Multiwall carbon nanotube polyvinyl alcohol-based saturable absorber in passively Q-switched fiber laser

Ahmad, H and Ismail, Mohammad Faizal and Hassan, S.N.M and Ahmad, Faizah and Zulkifli, Mohd Zamani and Harun, Sulaiman Wadi (2014) Multiwall carbon nanotube polyvinyl alcohol-based saturable absorber in passively Q-switched fiber laser. Applied Optics, 53 (30). pp. 7025-7029. ISSN 1559-128X E-ISSN 2155-3165

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In this work, we demonstrated a compact Q-switched erbium-doped fiber laser capable of generating high-energy pulses using a newly developed multiwall carbon nanotube (CNT) polyvinyl alcohol (PVA) thin film based saturable absorber. Q-switched pulse operation is obtained by sandwiching the thin film between two fiber ferrules forming a saturable absorber. A saturable absorber with 1.25 wt. % of PVA concentration shows a consistency in generating pulsed laser with a good range of tunable repetition rate, shortest pulse width, and produces a high pulse energy and peak power. The pulse train generated has a maximum repetition rate of 29.9 kHz with a corresponding pulse width of 3.49 μs as a function of maximum pump power of 32.15 mW. The maximum average output power of the Q-switched fiber laser system is 1.49 mW, which translates to a pulse energy of 49.8 nJ. The proposed method of multiwall CNT/PVA thin film fabrication is low in cost and involves uncomplicated processes.

Item Type: Article (Journal)
Additional Information: 8870/84298
Uncontrolled Keywords: Carbon nanotubes, Fiber lasers, Fibers, Nano tubes, Optical pumping, Polyvinyl alcohols, Pulse repetition rate, Pulsed lasers, Q switched lasers, Q switching, Saturable absorbers, Thin films, Yarn
Subjects: Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Science > Department of Physics
Kulliyyah of Science
Depositing User: Dr M Z Zulkifli
Date Deposited: 17 Nov 2020 16:57
Last Modified: 17 Nov 2020 16:57
URI: http://irep.iium.edu.my/id/eprint/84298

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