A widely tunable and highly efficient fiber laser device based on a ytterbium- doped double-clad fiber with high output power up to 1.5 W is demonstrated. By using an external cavity in Littrow-Littman-configuration the laser wavelength was tunable over a range of 15.7 THz from 1040 nm to 1100 nm and a spectral linewidth of 0.6 GHz over the whole tuning range was achieved.

© 2001 Optical Society of America

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