Abstract
The vapor-phase axial deposition method (VAD) was first reported by Izawa et al.1 In this method raw vapor materials are injected from torches into a chamber and react by hydrolysis to form fine glass particles, which are deposited on an end of a rotating rod as a lightly sintered cylindrical porous preform. This is then consolidated into a transparent preform in an electric furnace situated above the chamber. The deposition and the consolidation are continuous in the axial direction of the preforms.
© 1981 Optical Society of America
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