Abstract

Titanium-doped gallium lanthanum sulfide (Ti:GLS) and gallium lanthanum oxysulfide (Ti:GLSO) glasses have an absorption band at 500600nm that cannot be fully resolved because of its proximity to the band edge of the glass. At concentrations >0.5% a shoulder at 980nm is observed in Ti:GLS but not in Ti:GLSO. The emission spectra of Ti:GLS and Ti:GLSO both peak at 900nm with lifetimes of 67 and 97μs, respectively. We propose that the absorption at 600nm is due to the T2g2Eg2 transition of octahedral Ti3+ and the 980nm shoulder is due to Ti3+Ti4+ pairs.

© 2008 Optical Society of America

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