Photoinduced absorption in thulium-doped ZBLAN fibers (original) (raw)

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Author Affiliations

P. Laperle,1A. Chandonnet,1and R. Vallée2

1Institut National d’Optique, 369 rue Franquet, Sainte-Foy, Québec G1P 4N8, Canada

2Départment de Physique, Centre d’Optique Photonique et Laser, Université Laval, Sainte-Foy, Québec G1K 7P4, Canada

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Abstract

We report on the observation of photoinduced absorption in four different thulium-doped ZBLAN fibers exposed to 1.12-_μ_m light. The darkening rate is shown to follow a fourth-power dependence on the pumping intensity and a strong dependence on the Tm3+ concentration. The photoinduced absorption is observed mainly in the UV–visible part of the spectrum but extends slightly beyond 1 _μ_m in the near-infrared.

© 1995 Optical Society of America

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