H. Berthou, C. K. Jörgensen
Oct 1, 1990
Citations
2
Influential Citations
262
Citations
Quality indicators
Journal
Optics letters
Abstract
The codoping of a heavy-metal fluoride glass by two rare-earth ions, erbium and ytterbium, permits the semiconductor laser infrared excitation of two visible neighboring fluorescence lines of erbium by upconversion, the intensity ratio of which is a single variable function of temperature.