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

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Author Affiliations

P. Jelger,1,*M. Engholm,2L. Norin,3and F. Laurell1

1Department of Applied Physics, Royal Institute of Technology, 106 91 Stockholm, Sweden

2Fiber Optic Valley AB, 824 43 Hudiksvall, Sweden

3Acreo FiberLab, 824 12 Hudiksvall, Sweden

*Corresponding author: pj@laserphysics.kth.se

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Abstract

In 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.

© 2010 Optical Society of America

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