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 email@example.com
Revised: 11 July 2001
Published online: 15 October 2001
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 4S3/2 state and the 2P3/2 state on pump power (I) was experimentally investigated. Changes from I1 down to for the 4S3/2 state and from I2 down to I1 for the 2P3/2 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.
PACS: 42.65.Ky – Harmonic generation, frequency conversion
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001