公开(公告)号：DE69730945D1

公开(公告)日：2004-11-04

申请号：DE69730945

申请日：1997-01-21

Applicant: CORNING INC

Inventor： HENDERSON L ,  LI MING-JUN ,  WASHBURN R ,  NOLAN A

IPC: G02B6/00 ,  C03B37/027 ,  C03B37/03 ,  G02B6/02 ,  G02B6/024 ,  G02B6/16

Abstract: The invention provides improved methods for reducing polarization mode dispersion (PMD) in single mode fiber by spinning the fiber during the drawing process in accordance with a spin function having sufficient harmonic content to achieve low levels of PMD for commercial fibers for which the beat lengths of the fibers, including the beat lengths of different portions of the fibers, are variable and thus not readily known in advance. The spin functions of the invention take advantage of certain resonances in energy transfer between polarization modes to achieve substantial reductions in PMD for a wide range of beat lengths. Examples of suitable spin functions include frequency-modulated and amplitude-modulated sine waves.

公开(公告)号：DE69633066D1

公开(公告)日：2004-09-09

申请号：DE69633066

申请日：1996-12-12

Applicant: CORNING INC

Inventor： HAWTOF W ,  HENDERSON L ,  SMITH E ,  URRUTI H

IPC: B05B1/28 ,  B01J19/26 ,  C01B33/18 ,  C03B8/00 ,  C03B19/14 ,  C03B20/00 ,  C03B37/014 ,  C03C1/00 ,  C03C3/06 ,  C01B33/12

Abstract: The present invention is directed to a method for making fused silica glass. A liquid, preferably halide-free, silicon-containing compound capable of being converted by thermal oxidative decomposition to SiO2 is provided and introduced directly into the flame of a combustion burner, thereby forming finely divided amorphous soot. The amorphous soot is deposited on a receptor surface where, either substantially simultaneously with or subsequently to its deposition, the soot is consolidated into a body of fused silica glass. The invention further relates to an apparatus for forming fused silica from liquid, preferably halide-free, silicon-containing reactants which includes: a combustion burner which, in operation, generates a flame; an injector for supplying a liquid silicon-containing compound to the flame to convert the compound by thermal oxidative decomposition to a finely divided amorphous soot; and a receptor surface on which the soot is deposited.