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Conferences > CLEO_SI > 2013 > CM4I > CM4I.6

Suppression mechanism by Ca additive of photodarkening effect in Yb-doped silica glass fiber

Y. Fujimoto, S. Sugiyama, M. Murakami, H. Nakano, T. Sato, and H. Shiraga

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Abstract

We found that Ca additive effectively suppresses the photo-darkening (PD) effect in Yb-doped silica fiber even at 6.0 wt% of high Yb2O3 concentration. Ca ion works as a stabilizer to maintain the Yb3+ valence state. We hypothesize that this phenomenon may reflect the local charge balance effect in silica glass. This Yb-Ca co-doped silica fiber can be useful for high-power fiber lasers.

© 2013 Optical Society of America

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