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International Journal of Optics
Volume 2012 (2012), Article ID 475056, 6 pages
Research Article

Tunable Single-Longitudinal-Mode High-Power Fiber Laser

Department of Physics, Lakehead University, 955 Oliver Road, Thunder Bay, ON, Canada P7B 5E1

Received 1 October 2011; Accepted 5 December 2011

Academic Editor: Frédéric Smektala

Copyright © 2012 Jonas K. Valiunas and Gautam Das. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We report a novel CW tunable high-power single-longitudinal-mode fiber laser with a linewidth of 9 MHz. A tunable fiber Bragg grating provided wavelength selection over a 10 nm range. An all-fiber Fabry-Perot filter was used to increase the longitudinal mode spacing of the laser cavity. An unpumped polarization-maintaining erbium-doped fiber was used inside the cavity to eliminate mode hopping and increase stability. A maximum output power of 300 mW was produced while maintaining single-longitudinal-mode operation.