Abstract
Frequency upconversion into green and red luminescence in Er3+ and Yb3+ co-doped germanate glass pumped with a 978nm diode laser was presented. With increasing the excitation density, the green upconversion emission intensity was enhanced relative to the red one. Based on the emission spectra and the excitation density dependence of the upconversion emission intensity, we attributed the change of the upconversion emission spectra to the enhancement of three-photon excitation process to produce green luminescence with increasing the excitation density. The effects of this three-photon process on the 1.54μm emission were also discussed.
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Published version (
Free)
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
