Eur. Phys. J. D 39, 303-306 (2006)
https://doi.org/10.1140/epjd/e2006-00102-7

Ultraviolet upconversion in Pr³⁺:Y₂SiO₅ crystal by Ar⁺ laser (488 nm) excitation

¹ Department of Physics, Jilin University, Changchun, 130021, P.R. China
² Department of Physics, Yantai University, Yantai, 246005, P.R. China
³ Department of Physics, Linyi Normal University, Linyi, 276000, P.R. China

Corresponding author: ^a jzk@mail.jlu.edu.cn

Received: 30 December 2005
Revised: 8 March 2006
Published online: 18 May 2006

Abstract

Ultraviolet upconversion fluorescence band (260–350 nm) has been observed from Pr³⁺:Y₂SiO₅ pumped by Ar⁺ ion laser (488 nm). Power dependence of the fluorescence emitted from 4f5d, ³P₀ and ¹D₂ were measured. The upconversion mechanism was analyzed using the rate equations with a simplified three level model. It appears that excited state absorption (ESA) is the dominant upconversion process for lower Pr³⁺ concentration and energy transfer upconversion (ETU) is dominant for higher Pr³⁺ concentration.