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DOI : 10.1117/12.914613

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Photonics West : Optical Components and Materials IX, San Francisco, California : United States (2012)

A new vision of photodarkening in Yb-doped fibers

Romain Peretti 1, 2, Anne-Marie Jurdyc 1, Cedric Gonnet 3, 4

(06/03/2012)

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.

1 :	Laboratoire de Physico-Chimie des Matériaux Luminescents (LPCML)
	CNRS : UMR5620 – Université Claude Bernard - Lyon I
2 :	Institut des nanotechnologies de Lyon - Site d'Ecully (INL)
	CNRS : UMR5270 – Université Claude Bernard - Lyon I – Institut National des Sciences Appliquées (INSA) - Lyon – Ecole Centrale de Lyon
3 :	Draka Comteq
	Marcoussis
4 :	DRAKA
	DRAKA

Domaine

:

Physique/Physique/Optique

Mots Clés : photodarkening – Yb-doped fiber – Tm upconversion

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Contributeur : Romain Peretti <>

Soumis le : Mardi 6 Mars 2012, 09:09:47

Dernière modification le : Jeudi 10 Mai 2012, 18:13:53