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 Muhammad, 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). p. 1100108. ISSN 1077-260X

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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
Uncontrolled Keywords: Graphene-based saturable absorber; Mode-locking; Q-switching; Zirconia–Erbium-doped fiber (Zr-EDF)
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 26 Oct 2015 06:17
Last Modified: 27 Aug 2019 06:32
URI: http://eprints.um.edu.my/id/eprint/14337

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