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

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...

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Bibliographic Details
Published in:Journal of lightwave technology 2012-07, Vol.30 (13), p.2097-2102
Main Authors: Ahmad, H., bt Muhammad, Farah Diana, Zulkifli, M. Z., Latif, A. A., Harun, S. W.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Doped-insulator lasers and other solid state lasers
Electric, optical and optoelectronic circuits
Electronics
Erbium-doped fiber lasers
Exact sciences and technology
Fiber lasers
Fundamental areas of phenomenology (including applications)
Graphene
Integrated optics. Optical fibers and wave guides
Lasers
Masers
Optical and optoelectronic circuits
Optical fiber couplers
Optics
Physics
single longitudinal mode (SLM) fiber laser
tunable fiber Bragg grating (TFBG)
tunable radio frequency generation
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Summary: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.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2012.2192099