Degradation-resistant lasing at 980 nm in a Yb/Ce/Al-doped silica fiber

Jelger, P., Engholm, M., Norin, L., and Laurell, F.
Type of publication: 
Journal article

n this work we measure how photodarkening affects the optical efficiency for three different Yb/Al -doped silica fibers operating at 980 nm , one of which is codoped with cerium. A volume Bragg grating is used for linewidth control and added rejection of amplified spontaneous emission. Several hours of degradation-resistant operation is obtained with the Ce-codoped fiber, while for the Yb/Al doped fibers a large drop in efficiency is observed within the first hour of operation. Our results show that Yb/Ce/Al -doped fibers could be excellent candidates for high-power 980 nm fiber laser sources.

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Published in: 
JOSA B, 27 (2), 338-342. 2010.