Tunable Radio Frequency Generation Using a Graphene-Based Single Longitudinal Mode Fiber Laser

Ahmad, Harith and Muhammad, Farah Diana and Zulkifli, Mohd Zamani and Latif, Amirah Abdul 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, DOI https://doi.org/10.1109/JLT.2012.2192099.

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Official URL: https://doi.org/10.1109/JLT.2012.2192099


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
Funders: University of Malaya: HIR Grant Terahertz, UM.C/HIR/MOHE/SC/01, Ministry of Higher Education
Uncontrolled Keywords: Graphene; Single longitudinal mode (SLM) fiber laser; Tunable fiber Bragg grating (TFBG); Tunable radio frequency generation
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: 04 Jan 2019 09:07
Last Modified: 20 Feb 2020 04:50
URI: http://eprints.um.edu.my/id/eprint/19908

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