Luminescence of ytterbium doped LiNbO₃:MgO under UV excitation

A. Brenier Laboratoire de Physico-Chimie des Matériaux Luminescents, URA CNRS N°442, Université Claude Bernard-Lyon I, 43 Bd11 Novembre 1918, 69622, Willeurbanne, Cédex, France

C. Madej Laboratoire de Physico-Chimie des Matériaux Luminescents, URA CNRS N°442, Université Claude Bernard-Lyon I, 43 Bd11 Novembre 1918, 69622, Willeurbanne, Cédex, France

C. Pédrini Laboratoire de Physico-Chimie des Matériaux Luminescents, URA CNRS N°442, Université Claude Bernard-Lyon I, 43 Bd11 Novembre 1918, 69622, Willeurbanne, Cédex, France

G. Boulon Laboratoire de Physico-Chimie des Matériaux Luminescents, URA CNRS N°442, Université Claude Bernard-Lyon I, 43 Bd11 Novembre 1918, 69622, Willeurbanne, Cédex, France

Abstract

The usual absorption and luminescence of the trivalent ytterbium ions stand in the 900-1100 nm range. Under 355 nm laser excitation in ytterbium doped LiNbO₃:MgO we observed in addition a weak broad band emission extending from 700 to at least 900 nm. Its lifetime is about 1 μs. Its excitation spectrum is composed of at least one band near 325 nm. This unexpected luminescence has similarities with well-known luminescence in divalent ytterbium doped fluorides.

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Luminescence of ytterbium doped LiNbO₃:MgO under UV excitation

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Luminescence of ytterbium doped LiNbO₃:MgO under UV excitation