Infrared absorption of some high-purity chalcogenide glasses |
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Authors: | AR Hilton DJ Hayes MD Rechtin |
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Institution: | Texas Instruments Inc., Dallas, Texas 75222, USA |
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Abstract: | New compouning techniques were devised to prepare high-purity Ge28Sb12Se60 (TI 1173)and Ge33As12Se55 TI 20). The methods were based on the combination of the reactant purification and compounding steps. The goal of the program was to establish the absorption limit for the glasses and to lower the absorption at 10.6 μm. At the present purity level, the GeSbSe glass is found to have an absorption level of about 0.01 cm?1 at 10.6 μm while the absorption level for the GeAsSe glass is 0.05 cm?1. Underlying causes for the limits are discussed along with the possibilities for improvement. |
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