Patent ID: 8516855
Filing Date: 2013-08-27
Classification: C03B

Abstract:
1. A method for producing an optical fiber preform, comprising: forming glass soot particles by jetting and combusting a glass-forming material and a fuel gas from a burner in the presence of oxygen; depositing in a plurality. of deposition passes. a plurality of deposition layers comprised of said glass soot particles on a deposition rod having a longitudinal axis, each of said plurality of deposition layers being deposited by rotating said deposition rod about said longitudinal axis at a rotational velocity while translating said burner relative to said deposition rod in parallel to said longitudinal axis at a translation velocity; and providing said preform with a density distribution that is substantially uniform in a radial direction such that each of said plurality of deposition layers has a density between about 0.4 g/cm wherein the same translation velocity is used throughout deposition of each of the plurality of deposition layers.