Q-Switching and mode-locking in highly doped Zr2O3–Al2O3–Er2O3-doped fiber lasers using graphene as a saturable absorber

Ahmad, Harith and Thambiratnam, Kavintheran and Mohd Daud, Farah Diana and Zulkifli, Mohd Zamani and Zulkifli, Ahmad Zarif and Paul, Mukul Chandra and Harun, Sulaiman Wadi (2014) Q-Switching and mode-locking in highly doped Zr2O3–Al2O3–Er2O3-doped fiber lasers using graphene as a saturable absorber. IEEE Journal of Selected Topics in Quantum Electronics, 20 (1). ISSN 1077-260X E-ISSN 1558-4542

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Abstract

The application of graphene as a saturable absorber (SA) for generating Q-switched and mode-locked pulses in a Zirconia–Erbium-doped fiber (Zr-EDF) laser is explored. Graphene-based SAs have a very wide operational range, which complements the extended operational bandwidth of the Zr-EDF. The Zr-EDF has an erbium concentration of about 4320 ppm, with absorption rates of 22.0 and 58.0 dB/m at 987 and 1550 nm. The system is capable of generating Q-switched pulses with pulsewidths and energies of 4.6 μs and 16.8 nJ, respectively, as well as peak powers of 3.6 mW at a repetition rate of 50.1 kHz. The Zr-EDF laser can also generate mode-locked pulses with pulsewidths, average output powers, pulse energies, and peak powers of 730 fs, 1.6 mW, 23.1 pJ, and 31.6 W, respectively, at a repetition rate of 69.3 MHz. Both the Q-switched and mode-locked output pulses are highly stable, allowing for their application in a multitude of real-world applications.

Item Type:	Article (Journal)
Additional Information:	8870/84299
Uncontrolled Keywords:	Graphene-based saturable absorber, modelocking, Q-switching, Zirconia–Erbium-doped fiber (Zr-EDF)
Subjects:	Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Physics
Depositing User:	Dr M Z Zulkifli
Date Deposited:	18 Nov 2020 10:21
Last Modified:	18 Nov 2020 10:21
URI:	http://irep.iium.edu.my/id/eprint/84299

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