公开(公告)号：JP2001226123A

公开(公告)日：2001-08-21

申请号：JP2001011177

申请日：2001-01-19

Applicant: CORNING INC

Inventor： MARLEY FLOYD E ,  MISRA MAHENDRA KUMAR ,  SPROUL MERRILL F

IPC: C03B8/04 ,  C03B19/14 ,  C03B20/00 ,  F27D7/06

Abstract: PROBLEM TO BE SOLVED: To reduce a harmful influence on newly formed silica glass due to the air entering into a furnace and to improve the uniformity of dissolved hydrogen in the glass in a producing method of silica glass by flame hydrolysis. SOLUTION: Boule 19 of silica glass is formed by flame hydrolysis. A peripheral passage 175 for circulating air around the formed boule 19 is provided. At least one part of air flow is kept apart from the formed boule 19 and is made to flow outward in the radial direction and, thereby, the influence on the homogeneity of the boule 19 is reduced.

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.