1.2 µm and 1.5 µm near-infrared photoluminescence and visible upconversion photoluminescence in GeGaS:Er 3+ /Ho 3+ glasses under 980 nm excitation

摘要: We report on the Er3+ ↔ Ho3+ optical interaction 1.2 and 1.5 µm near-infrared visible upconversion photoluminescence in Er3+/Ho3+-co-doped GeGaS glasses at pumping wavelength of 980 nm. Since 980 nm is off resonance for Ho3+ intra-4f electronic transitions, we have utilized Er3+ sensitization with observed efficient Er3+ → Ho3+ energy transfer. As a result, 1.2 µm emission glass has been notably improved while intense maintained. The 530, 550 660 nm was assigned mainly to transitions within ions. overall intensity significantly increases by addition ions into GeGaS:Er which may be explained transfer processes between leading population upper levels. much potential telecommunication sensing.