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26 October 2007 A tunable erbium doped fiber ring laser without the use of intra cavity filters
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Proceedings Volume 6796, Photonics North 2007; 679611 (2007)
Event: Photonics North 2007, 2007, Ottawa, Canada
A simple technique to obtain a tunable laser using an erbium doped fiber in a ring cavity is proposed and demonstrated. The design does not include intra cavity filters to achieve tunable action; instead, it relies on the influence of intra cavity loss on the lasing wavelength. The dependence of tunability on factors such as the doping concentration of the fiber, reflectivity of the coupler, length of the doped fiber and pump power is discussed comprehensively using an analytical model and demonstrated experimentally. The effect of pump power on the lasing wavelength as seen in the experiment, which is not a direct consequence of the analytical model of fiber lasers, is discussed qualitatively. The key to enhance tunability is to increase the inversion levels in the fiber, which is possible with the use of shorter lengths of fiber with higher dopant concentration and larger pump powers, with maximum reflection into the cavity.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Deepa Venkitesh and R. Vijaya "A tunable erbium doped fiber ring laser without the use of intra cavity filters", Proc. SPIE 6796, Photonics North 2007, 679611 (26 October 2007);


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