公开(公告)号：AU2002367308A1

公开(公告)日：2003-07-24

申请号：AU2002367308

申请日：2002-07-11

Applicant: FIBERCORE INC

Inventor： HAMMERLE WOLFGANG ,  KOTZING JORG ,  ASLAMI MOHD A

IPC: C03B37/018

Abstract: A method and apparatus for making optical fiber preforms using modified chemical vapor deposition (MCVD) A starting tubular member is installed on a chemical vapor deposition apparatus and, using MCVD, a predetermined amount of selectively doped silica is deposited and consolidated on the inner surface to form an intermediate uncollapsed preform tube. At least a portion of the intermediate uncollapsed preform tube is removed from the chemical vapor deposition apparatus, installed in a collapsing apparatus and collapsed. The collapsing uses an oxy-hydrogen burner or a plasma torch. Optionally, additional deposition is performed during the collapsing operation. A stretching may be performed concurrent with the collapsing.