Improved photodarkening resistivity in ytterbium-doped fiber lasers by cerium codoping

Abstract

We show that the photodarkening resistivity of ytterbium-doped fiber lasers can be greatly improved by cerium codoping. It is suggested that the coexistence of the redox couple ${\mathrm{Ce}}^{3+}∕{\mathrm{Ce}}^{4+}$ in the glass provides means for trapping both hole- and electron-related color centers that are responsible for the induced optical losses in Yb-doped fiber lasers.

© 2009 Optical Society of America

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