Title

Fluorescence quantum efficiency measurements in the presence of Auger upconversion by the thermal lens method

Authors

Authors

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

Comments

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Abbreviated Journal Title

Opt. Lett.

Keywords

LASER CRYSTALS; UP-CONVERSION; CRLISRALF6; OPERATION; Optics

Abstract

Mode-mismatched thermal lens (TL) measurements in Cr3+-doped fluoride crystals (LiSrAlF6 and LiSrGaF6) are reported. A nonlinear increase of the TL signal, and decrease of quantum efficiency, with increasing excitation power was observed and attributed to energy-transfer upconversion (ETU). Assuming an upconversion rate that is proportional to the excited-state population, W-up = gammaN(e), the theoretical model developed fits the experimental data well. The ETU parameters (gamma) were determined with unprecedented accuracy for low Cr concentrations. Thermo-optical parameters (K, ds/dT) were also obtained. (C) 2003 Optical Society of America.

Journal Title

Optics Letters

Volume

28

Issue/Number

4

Publication Date

1-1-2003

Document Type

Article

DOI Link

http://dx.doi.org/10.1364/ol.28.000239

Language

English

First Page

239

Last Page

241

WOS Identifier

WOS:000180757400007

ISSN

0146-9592

Recommended Citation

"Fluorescence quantum efficiency measurements in the presence of Auger upconversion by the thermal lens method" (2003). Faculty Bibliography 2000s. 3964.
https://stars.library.ucf.edu/facultybib2000/3964