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Proceedings Paper

A new vision of photodarkening in Yb3+-doped fibers
Author(s): Romain Peretti; Cédric Gonnet; Anne-Marie Jurdyc
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Paper Abstract

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.

Paper Details

Date Published: 2 March 2012
PDF: 7 pages
Proc. SPIE 8257, Optical Components and Materials IX, 825705 (2 March 2012); doi: 10.1117/12.914613
Show Author Affiliations
Romain Peretti, Univ. Lyon 1, CNRS (France)
Ecole Centrale de Lyon (France)
Cédric Gonnet, Draka (France)
Anne-Marie Jurdyc, Univ. Lyon 1, CNRS (France)


Published in SPIE Proceedings Vol. 8257:
Optical Components and Materials IX
Shibin Jiang; Michel J. F. Digonnet; J. Christopher Dries, Editor(s)

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