Frequency upconversion of Er3+ in Ga2S3-GeS2-La2S3 glasses

摘要

Abstract: Glasses containing Er$+3$PLU$/ ions of 0.3 to 7 cation mol percent were prepared in the system of Ga$-2$/S$-3$/-GeS$- 2$/-LaS$-3$/. Frequency upconversion spectra of Er$+3$PLU$/ in the glasses were measured under the excitation at 800 nm and 980 nm. Green emissions at 533 nm ($+2$/H$- 11/2$/$YLD$+4$/I$-15/2$/) and 552 nm ($+4$/S$- 3/2$/$YLD$+4$/I$-15/2$/), and red emission at 665 nm ($+4$/F$-9/2$/$YLD$+4$/I$-15/2$/) were observed.In addition to these emission bands, 497 nm emission assigned to the $+4$/F$-7/2$/$YLD$+4$/I$-15/2$/ transition was observed. The spectral properties are analyzed from the view points of low phonon energy property and high refractive index. !19