Abstract

Low- and high-refractive-index chalcogenide glasses are studied for their potential use in the fabrication of one-dimensional hollow Bragg fibers. The low-index glasses are based on the GeSe–glass systems with indices varying from 2.0 to 2.5, while the high-index glasses are formed from the AgAsSe glasses with indices ranging from 2.8 to 3.8. High-purity elemental starting materials are distilled and the surface oxides removed prior to mixing in a rocking furnace. The refractive indices of the AgAsSe glasses, measured using a CO2 laser reflectometer, were near 3.10 for the compositions most compatible with the low-index Ge20Se80 glass (n=2.46). Spectral measurements show impurity absorption bands between 12 and 16μm. The loss at 10.6μm for the Ag25As40Se35 glass measured using CO2 laser calorimetry was 1.16×103cm1.

© 2009 Optical Society of America

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