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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 30, Iss. 13 — Jul. 1, 2012
  • pp: 2097–2102

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

Harith Ahmad, Farah Diana bt Muhammad, Mohd. Zamani Zulkifli, Amirah Abd Latif, and Sulaiman Wadi Harun

Journal of Lightwave Technology, Vol. 30, Issue 13, pp. 2097-2102 (2012)

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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.

© 2012 IEEE

Harith Ahmad, Farah Diana bt Muhammad, Mohd. Zamani Zulkifli, Amirah Abd Latif, and Sulaiman Wadi Harun, "Tunable Radio Frequency Generation Using a Graphene-Based Single Longitudinal Mode Fiber Laser," J. Lightwave Technol. 30, 2097-2102 (2012)

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