公开(公告)号：EP1444171A4

公开(公告)日：2008-10-29

申请号：EP02766360

申请日：2002-09-24

Applicant: CORNING INC

Inventor： DAWES STEVEN B ,  HAWTOF DANIEL W ,  MURTAGH MICHAEL T ,  ROSETTIE JOHN S ,  SCHERMERHORN ANDREW P ,  SPROUL MERRILL F ,  STONE JOHN III ,  TANDON PUSHKAR

IPC: C03B37/014 ,  C03B37/018 ,  C03B37/012

CPC classification number: C03B37/01446 ,  C03B37/0146 ,  C03B2201/12 ,  C03B2201/20

Abstract: A method of manufacturing an optical waveguide preform includes providing a first process gas atmosphere to a soot preform contained in a vessel. The first atmosphere is held in the vessel for a first reacting time sufficient to at least partially dope or dry the soot preform. The vessel is then at least partially refilled with a second doping or drying atmosphere. The second doping or drying atmosphere is held in the vessel for a second reacting time sufficient to further dope or dry the soot preform.