Title

Discrimination between thermal quenching of the fluorescence and Auger upconversion processes using thermal lens technique

Authors

Authors

V. Pilla; H. P. Jenssen; A. Cassanho;T. Catunda

Comments

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Abbreviated Journal Title

Opt. Commun.

Keywords

QUANTUM EFFICIENCY; LASER CRYSTALS; SPECTROMETRY; CRLISRALF6; OPERATION; Optics

Abstract

In this work we used the Thermal Lens (TL) technique to discriminate two important processes responsible to reduce the upper-state population and fluorescence quantum efficiency (eta) in Cr3+ doped colquiriite crystals: the thermal quenching of the fluorescence (TQF) and the Auger upconversion (ETU). We observed a nonlinear increase of the TL signal with laser power due to the decrease of eta by ETU and/or TQF. The analysis of these curves allowed the determination of the thermal load, the increase of the crystal temperature as a function of the pump excitation and the discrimination between ETU and TQF processes. (c) 2006 Elsevier B.V. All rights reserved.

Journal Title

Optics Communications

Volume

271

Issue/Number

1

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

184

Last Page

189

WOS Identifier

WOS:000243984800030

ISSN

0030-4018

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