Passively Q-switched erbium-doped fibre laser using cobalt oxide nanocubes as a saturable absorber

Nady, A. and Ahmed, Mahmoud Hazzaa M. and Numan, Arshid and Ramesh, Subramaniam and Latiff, Anas Abdul and Ooi, Chong Heng Raymond and Arof, Hamzah and Harun, Sulaiman Wadi (2017) Passively Q-switched erbium-doped fibre laser using cobalt oxide nanocubes as a saturable absorber. Journal of Modern Optics, 64 (13). pp. 1315-1320. ISSN 0950-0340, DOI

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We demonstrate a Q-switched Erbium-doped fibre laser (EDFL) utilizing cobalt oxide (Co3O4) nanocubes film based saturable absorber (SA) as a passive Q-switcher. Co3O4 nanocubes are embedded into a polyethylene oxide film to produce a high nonlinear optical response, which is useful for SA application. It has saturation intensity and modulation depth of 3 MW/cm2 and 0.35%, respectively. The proposed laser cavity successfully generates a stable pulse train where the pulse repetition rate is tunable from 29.8 to 70.92 kHz and the pulse-width reduces from 10.9 to 5.02 μs as the 980 nm pump power increases. This result indicates that the Co3O4 is excellent for constructing an SA that can be used in producing a passively Q-switched fibre laser operating at a low pump intensity. To the best of our knowledge, this is the first demonstration of Co3O4 film based fibre laser.

Item Type: Article
Funders: University of Malaya: [grant Number PG005-2016A], [grant number PG008-2016A]
Uncontrolled Keywords: Cobalt oxide (Co3O4) nanocubes; Fibre laser; Passive saturable absorber; Q-switching
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Faculty of Science > Department of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 23 Nov 2018 07:55
Last Modified: 23 Nov 2018 07:55

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