Zinc oxide (ZnO) nanoparticles as saturable absorber in passively Q-switched fiber laser

Ahmad, Harith and Lee, C.S.J. and Ismail, M.A. and Ali, Z.A. and Reduan, S.A. and Ruslan, N.E. and Ismail, Mohammad Faizal and Harun, Sulaiman Wadi (2016) Zinc oxide (ZnO) nanoparticles as saturable absorber in passively Q-switched fiber laser. Optics Communications, 381. pp. 72-76. ISSN 0030-4018, DOI https://doi.org/10.1016/j.optcom.2016.06.073.

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Official URL: http://dx.doi.org/10.1016/j.optcom.2016.06.073


We demonstrate a passively Q-switched erbium-doped fiber laser using zinc oxide (ZnO) nanoparticles thin film as saturable absorber (SA). ZnO exhibits high nonlinear optical response and fast recovery time, fulfilling the requirements of an ideal SA. The nonlinear optical absorption is characterised by modulation depth of 3.5% with saturation intensity of 0.016 MW cm−2. We insert the SA into the laser cavity and obtain stable Q-switched pulse whereby the repetition rate increases from 41.7 kHz to 77.2 kHz while the pulse width decreases from 9.6 μs to 3.0 μs as the pump power is increased from 60 mW to 360 mW. This result suggests that ZnO could be a promising SA for photonic applications.

Item Type: Article
Funders: University of Malaya (grant no: LRGS(2015)NGOD/UM/KPT), Ministry of Higher Education of Malaysia (grant no: GA010-2014(ulung))
Uncontrolled Keywords: Q-switched lasers; Zinc oxide; Saturable absorber; Fiber laser
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 14 Aug 2017 06:09
Last Modified: 09 Oct 2018 03:59
URI: http://eprints.um.edu.my/id/eprint/17688

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