Vapor Axial Deposition
Vapor axial deposition (VAD) is a fiber preform fabrication method where core and cladding layers are simultaneously deposited as glass particles on a rotating bait structure to form the fiber inner cladding and core structrure. Silicon chloride, SiCl4 and germanium chloride, GeCl4 are oxidized to form silica and germania particles.
Related Terms: Cladding, Core, Modified Chemical Vapor Deposition (MCVD)