Open AccessMultiphoton-excited upconversion luminescence of Nd:YVO4
Author(s) -
Xinshun Wang,
Juan Song,
Haiyi Sun,
Zhizhan Xu,
Jianrong Qiu
Publication year - 2007
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.001384
Subject(s) - photon upconversion , femtosecond , laser , materials science , optics , excited state , luminescence , excitation , optoelectronics , laser diode , diode , atomic physics , physics , quantum mechanics
Fluorescence spectra of Nd:YVO(4) under excitation of a continuous wave (CW) diode laser and a femtosecond laser at 800nm were investigated. It was found that Nd:YVO(4) shows different upconversion and downconversion luminescencent behaviors when excited by the diode laser and the femtosecond laser. The dependence of the upconversion luminescence intensity on the pump power of the femtosecond laser was discussed. The populations of the upper energy levels for upconversion and downconversion luminescence were calculated based on the Bloch equations. The calculations agree well with the experimental results.