Title

Fluorescence Quantum Efficiency Measurements In The Presence Of Auger Upconversion By The Thermal Lens Method

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 upcon-version rate that is proportional to the excited-state population, Wup = γN6, the theoretical model developed fits the experimental data well. The ETU parameters (γ) were determined with unprecedented accuracy for low Cr concentrations. Thermo-optical parameters (K, ds/dT) were also obtained. © 2003 Optical Society of America.

Publication Date

2-15-2003

Publication Title

Optics Letters

Volume

28

Issue

4

Number of Pages

239-241

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OL.28.000239

Socpus ID

0037443132 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0037443132

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