Spectroscopy of titanium-doped gallium lanthanum sulfide glass
نویسندگان
چکیده
Titanium-doped gallium lanthanum sulfide (Ti:GLS) and gallium lanthanum oxysulfide (Ti:GLSO) glasses have an absorption band at 500–600 nm that cannot be fully resolved because of its proximity to the band edge of the glass. At concentrations 0.5% a shoulder at 980 nm is observed in Ti:GLS but not in Ti:GLSO. The emission spectra of Ti:GLS and Ti:GLSO both peak at 900 nm with lifetimes of 67 and 97 s, respectively. We propose that the absorption at 600 nm is due to the T2g→ Eg transition of octahedral Ti3+ and the 980 nm shoulder is due to Ti3+–Ti4+ pairs. © 2008 Optical Society of America OCIS codes: 300.2530, 140.3380.
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