White light simulation by up-conversion in fluoride glass host

We have produced white light using infrared excitation by addictive synthesis of red, green and blue (RGB) upconverted radiation, in a lanthanide-doped fluoride-based glass, named full-color glass, FCG-III. This glass generates simultaneously RGB emissions from 980 nm excitation by up-conversion process, with high precision of color coordinates and high efficiency. The ions Er3+ and Tm3+ were used as simultaneous narrow line emitters of the three primary light colors. The Tm3+ and Er3+ concentrations in the glass host were adjusted, favoring light color tuning and generation of a wide color gamut in the visible spectrum, and white light simulation under single infrared excitation. (C) 2002 Elsevier Science B.V. All rights reserved.