Graphene-based mode-locked spectrum-tunable fiber laser using mach–zehnder filter

Ahmad, Harith and Muhammad, Farah Diana and Zulkifli, Mohd Zamani and Harun, Sulaiman Wadi (2013) Graphene-based mode-locked spectrum-tunable fiber laser using mach–zehnder filter. IEEE Photonics Journal, 5 (5). pp. 1-10. ISSN 1943-0655 E-ISSN 1943-0647

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Abstract

An ultrafast spectrum-tunable fiber laser using a tunable Mach–Zehnder filter (TMZF) and a graphene-based saturable absorber as a mode-locking element is proposed and demonstrated. The proposed laser uses a 2-m-long zirconia–erbium-doped fiber (Zr-EDF) as the primary gain medium. The Zr-EDF has a dopant concentration of 3800 ppm/wt and an absorption rate of 18.3 dB/m at 980 nm. The proposed laser is able to generate mode-locked solitons, with the central wavelength of the spectrum tunable from 1551 to 1570 nm and covering a wavelength range of about 19 nm. Sidebands are observed with 3-dB bandwidths and pulsewidths of between 3.4 and 3.6 nm and from 730 to 780 fs, respectively, as well as a time–bandwidth product between 0.32 and 0.33. The generated pulse yields an average output power value of 1.4 mW, pulse energy of 128 pJ, and repetition rate of 10.9 MHz. This is the first time, to the knowledge of the authors, that a graphene-based mode-locked spectrum-tunable fiber laser is demonstrated using a TMZF.

Item Type:	Article (Journal)
Additional Information:	8870/84305
Uncontrolled Keywords:	Graphene-based saturable absorber, zirconia-based erbium-doped fiber,Mach–Zehnder filter, spectrum tunable mode-locked.
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 11:11
Last Modified:	18 Nov 2020 11:11
URI:	http://irep.iium.edu.my/id/eprint/84305

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