Patent ID: 7441417
Filing Date: 2008-10-28
Classification: C03B

Abstract:
1. An Outside Vapor Deposition (OVD) apparatus for making an optical fiber preform comprising: a mandrel having a predetermined length and capable of rotating; and a burner for emitting predetermined reaction gas together with combustion gas toward the mandrel to generate material particles of an optical fiber preform so that the material particles are deposited on a surface of the mandrel to form the optical fiber preform, wherein the burner has a length substantially equal to the mandrel, has an array of gas spreading channels successively connected to each other along the direction of the mandrel's central axis, and provides uniform temperature throughout the overall length of the mandrel at the same time, wherein a section of each channel becomes wider in the direction of the mandrel's central axis from a gas input portion to a gas output end portion, and wherein each gas spreading channel respectively emits the combustion gas together with the reaction gas.