Efficient 2 mu m emission and energy transfer mechanism of Ho3+ doped fluorophosphate glass sensitized by Er3+ ions

摘要

Fluorophosphate glass co-doped with Er3+ and Ho3+ ions has been synthesized by high temperature melting method. Using a commercially available 980 nm laser diode, intense about 2 mu m emissions were successfully obtained in present Ho3+/Er3+ co-doped glasses without obvious quenching. To understand 2 mu m fluorescence behaviors of the prepared glasses, 1.55 mu m emission spectra, energy transfer mechanism and microparameters from different levels of Er3+ to Ho3+ ions have been obtained and discussed. As a result, the Er3+/Ho3+ co-doped fluorophosphate glass with excellent spectroscopic properties might be appropriate host material for 2 mu m solid laser. (C) 2018 Elsevier B.V. All rights reserved.