Arsenic-sulfide glasses with low content of hydrogen impurity for fiber optics

The article discusses the problem of preparing arsenic-sulfide glasses for fiber optics with a low content of impurity hydrogen which determines the level of optical absorption loss in the range of 2-6 μm. The sources of impurity hydrogen in the form of SH-groups with its content of 1-100 ppb wt, their relative contribution and the effect on the transparency of bulk samples of glasses and optical fibers are considered. The results of studies of the contaminating effect of the apparatus material and the environment in the preparation of arsenic-sulfide glasses and optical fibers on their basis with low optical losses are presented.