Tunable radio frequency generation using a graphene-based single longitudinal mode fiber laser

Ahmad, Harith and Muhammad, Farah Diana and Zulkifli, Mohd Zamani and Abdul Latif, Amirah and Harun, Sulaiman Wadi (2012) Tunable radio frequency generation using a graphene-based single longitudinal mode fiber laser. Journal of Lightwave Technology, 30 (13). pp. 2097-2102. ISSN 0733-8724 E-ISSN 1558-2213

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Abstract

A novel, simple, and short cavity design of single longitudinal mode (SLM) tunable erbium-doped fiber ring laser using a graphene-based saturable absorber is proposed and demonstrated as a tunable signal source. The SLM output is then mixed with another output signal from a tunable laser source (TLS) to generate tunable radio frequency (RF) signals. The tunable SLM fiber ring laser uses a short length of 1 m highly doped erbium-doped fiber as the gain medium. Graphene is used as a saturable absorber to generate the SLM operation, as opposed to the commonly used unpumped erbium-doped fiber. The tuning range of the fiber ring laser is determined by a tunable fiber Bragg grating, which can be tuned from 1547.88 to 1559.88 nm. A continuous wavelength spacing tuning range of 0.020–0.050 nm is obtained between the output of the SLM fiber ring laser and the TLS which is then mixed in a 6 GHz bandwidth optical-to-electrical convertor. This generates a corresponding RF signal of between 2.4 and 5.9 GHz with a low variation in output power. The current RF signal generation is limited by the frequency bandwidth of the optical-to-electrical convertor.

Item Type:	Article (Journal)
Additional Information:	8870/84326
Uncontrolled Keywords:	—Graphene, single longitudinal mode (SLM) fiber laser, tunable fiber Bragg grating (TFBG), tunable radio frequency generation
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:	24 Nov 2020 21:23
Last Modified:	24 Nov 2020 21:23
URI:	http://irep.iium.edu.my/id/eprint/84326

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