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Communication Dans Un Congrès Année : 2012

A new vision of photodarkening in Yb-doped fibers

Résumé

Yb3+-doped fiber is one of the most promising hosts for high-power fiber lasers [1]. However, in the late 1990s, photodarkening effect, i.e., the creation of color centers induced by light, was observed and reported [2]. Like in other rare-earth-doped materials, a broad visible and near infrared absorption band appears during laser operation, which strongly lowers the laser efficiency. We have shown how thulium impurities, present at the parts-per-billion weights (ppb) level in the raw doping material, can induce UV emission which in turn creates defects responsible for photodarkening in ytterbium-doped continuous-wave fiber lasers [3]. This new vision is not in contradiction with others but it gives for the first time a possible explanation for UV defect creation by an infrared beam.
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Dates et versions

hal-00676689 , version 1 (06-03-2012)

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Romain Peretti, Anne-Marie Jurdyc, Cedric Gonnet. A new vision of photodarkening in Yb-doped fibers. Photonics West : Optical Components and Materials IX, Jan 2012, San Francisco, California, United States. pp.825705, ⟨10.1117/12.914613⟩. ⟨hal-00676689⟩
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