Affiliation:
1. Harbin Engineering University
2. University of Southampton
Abstract
Simultaneous blue-red emission in a fiber pumped by a single wavelength source is perceived as a great challenge because of the large energy difference of the emitted photons. This Letter reports the dependence of the blue-to-red upconversion (UC) emission ratio in Yb3+-Tm3+ codoped fluorosilicate glasses (FSGs) under the excitation of a 980-nm laser on the host glass silica content. Photoluminescence spectra and SEM-EDS are used to clarify the UC mechanism, indicating that the probability of the cross-relaxation (CR) process 1G4 + 3F2→3H6 + 3F4 is key to the dominance of the blue or red emissions. This research can provide a new platform for variable UC luminescence.
Funder
National Key Scientific Instrument and Equipment Development Projects of China
Shenzhen Fundamental Research Program
Basic and Applied Basic Research Foundation of Guangdong Province
National Natural Science Foundation of China
Subject
Atomic and Molecular Physics, and Optics