Visible dual-wavelength light generation in optical superlattice Er:LiNbO3 through upconversion and quasi-phase-matched frequency doubling

• DOI: 10.1063/1.121191
• Publication Date: 2002-07-26T13:43:06Z
• Authors: Jian-jun Zheng; Yan-qing Lu; Gui-peng Luo; Jing Ma; Ya-lin Lu; Nai-ben Ming; Jing-liang He; Zu-yan Xu
• Keywords: 02 engineering and technology; 0210 nano-technology

Optical superlattice Er:LiNbO3 was fabricated by inducing a periodic ferroelectric domain structure into the crystal during the growing process. Because of the combination of the nonlinear optical properties of LiNbO3 and the spectral properties of Er3+, the crystal can simultaneously emit the second harmonic light through quasi-phase matching and the green light through upconversion at room temperature. Pumped by infrared diode lasers, violet-and-green and blue-and-green light generation was demonstrated in two samples. The detailed absorption spectrum and emission spectrum of upconversion were measured. The possible physical mechanism was discussed.