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

    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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