Hughes, M., Rutt, Harvey, Hewak, D. and Curry, R.J.
Spectroscopy of vanadium (III) doped gallium lanthanum sulphide chalcogenide glass
Applied Physics Letters, 90, (31108), . (doi:10.1063/1.2432280).
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Vanadium doped gallium lanthanum sulphide glass (V:GLS) displays three absorption bands at 580, 730, and 1155nm identified by photoluminescence excitation measurements. Broad photoluminescence, with a full width at half maximum of ~500nm, is observed peaking at 1500nm when exciting at 514, 808, and 1064nm. The fluorescence lifetime and quantum efficiency at 300K were measured to be 33.4µs and 4%, respectively. From the available spectroscopic data, the authors propose the vanadium ions' valence to be 3+ and be in tetrahedral coordination. The results indicate a potential for the development of a laser or optical amplifier based on V:GLS.
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