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Proceedings Paper

A tunable erbium doped fiber ring laser without the use of intra cavity filters
Author(s): Deepa Venkitesh; R. Vijaya
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Paper Abstract

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.

Paper Details

Date Published: 26 October 2007
PDF: 8 pages
Proc. SPIE 6796, Photonics North 2007, 679611 (26 October 2007); doi: 10.1117/12.778715
Show Author Affiliations
Deepa Venkitesh, Indian Institute of Technology (India)
VSE College of Arts, Science and Commerce (India)
R. Vijaya, Indian Institute of Technology (India)

Published in SPIE Proceedings Vol. 6796:
Photonics North 2007
John Armitage, Editor(s)

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