Eur. Phys. J. D 17, 79-83 (2001)
https://doi.org/10.1007/s100530170040

Luminescence characteristics of ultraviolet upconversion from Er³⁺:YAG crystal by Ar⁺ laser (488 nm) excitation

Department of physics, Jilin University, ChangChun 130023, P.R. China

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

Received: 20 March 2001
Revised: 11 July 2001
Published online: 15 October 2001

Abstract

Ultraviolet and violet upconversion signals at 271 nm, 317 nm, 381 nm and 407 nm were observed when an erbium-doped YAG crystal was pumped by an Ar⁺ laser (488 nm). The dependence of intensity of luminescence emitting from the ⁴S_3/2 state and the ²P_3/2 state on pump power (I) was experimentally investigated. Changes from I¹ down to for the ⁴S_3/2 state and from I² down to I¹ for the ²P_3/2 state were observed. The upconversion mechanism was discussed by means of the rate equations. It appears that energy-transfer upconversion (ETU) is a dominant process for the Er³⁺:YAG crystal used in our experiment.