Variable ratio blue/red upconversion in Yb3+-Tm3+ codoped fluorosilicate glasses

• DOI: 10.1364/ol.496074
• Publication Date: 2023-06-20T16:02:42Z
• Authors: Xin Wang; Ke Tian; Haiyan Zhao; Xiaotong Zhao; Zhi Zhang; Jin Yu; Dejun Liu; Gilberto Brambilla; Pengfei Wang
• Keywords: Photon Upconversion

Simultaneous blue-red emission in a fiber pumped by single wavelength source is perceived as great challenge because of the large energy difference emitted photons. This Letter reports dependence blue-to-red upconversion (UC) ratio Yb3+-Tm3+ codoped fluorosilicate glasses (FSGs) under excitation 980-nm laser on host glass silica content. Photoluminescence spectra and SEM-EDS are used to clarify UC mechanism, indicating that probability cross-relaxation (CR) process 1G4 + 3F2→3H6 3F4 key dominance blue or red emissions. research can provide new platform for variable luminescence.