Abstract
Unclad optical fibers based on high-purity Te–As–Se glasses prepared by chemical and physical methods of purification have been drawn. The optical, thermal and mechanical properties of glasses and fibers were investigated. The minimum optical losses were 0.07 dB/m at 7.3 μm for Te 25As 40Se 35 glass fiber and 0.04 dB/m at 6.7 μm for Te 20As 30Se 50 glass fiber. Sixty five percent of input power of a tunable CO 2 laser emitting at 9.3 μm was transmitted through a 1 m long fiber with diameter of 900 μm.
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