Temperature-dependent stimulated emission cross section and concentration quenching in highly doped Nd3+: YAG crystals

    Authors

    J. Dong; A. Rapaport; M. Bass; F. Szipocs;K. Ueda

    Comments

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    Abbreviated Journal Title

    Phys. Status Solidi A-Appl. Mat.

    Keywords

    RARE-EARTH IONS; MICROCAVITY LASERS; ABSORPTION; YAG; INTENSITIES; LUMINESCENCE; SPECTRA; Materials Science, Multidisciplinary; Physics, Applied; Physics, ; Condensed Matter

    Abstract

    Measurements are reported of the spectroscopic properties (absorption and emission spectra, stimulated emission cross section, and radiative lifetime) of Nd:YAG crystals doped with 1, 2 and 3 at% Nd3+ in the temperature range between 70 and 300 K. The stimulated emission cross sections for these crystals were determined using the Fiichtbauer-Ladenburg (F-L) formula at each different temperature. The absorption spectra at room temperature were used to calculate the F-4(3/2) - > I-4(3/2) stimulated-emission cross section and the 4 F,, radiative lifetime according to Judd-Ofelt theory. As the temperature decreases the emission cross section increases, while the emission lifetime remains constant for all the samples. The temperature dependences of the stimulated emission cross sections for the differently doped crystals are in good agreement with earlier predictions. The concentration quenching effect in highly doped Nd: YAG was also addressed. Although there is concentration quenching in the highly doped Nd: YAG crystals, they are still promising efficient laser materials for high-power microchip solid-state lasers. (c) 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

    Journal Title

    Physica Status Solidi a-Applications and Materials Science

    Volume

    202

    Issue/Number

    13

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    2565

    Last Page

    2573

    WOS Identifier

    WOS:000232964500025

    ISSN

    0031-8965

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