vapor-phase axial deposition

vapor-phase axial deposition

[′vā·pər ¦fāz ′ak·sē·əl ‚dep·ə′zish·ən]
(engineering)
A method of fabricating graded-index optical fibers in which fine glass particles of silicon dioxide and germanium dioxide are synthesized and deposited on a rotating seed rod, and the synthesized porous preform is then pulled up and passes through a hot zone, undergoing dehydration and sintering, to become a porous preform. Abbreviated VAD.
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