METHOD FOR PRODUCING OPTICAL FIBER PREFORM, OPTICAL FIBER PREFORM, AND OPTICAL FIBER

Title:

METHOD FOR PRODUCING OPTICAL FIBER PREFORM, OPTICAL FIBER PREFORM, AND OPTICAL FIBER

Document Type and Number:

WIPO Patent Application WO/2013/111470

Kind Code:

A1

Abstract:

A method for producing an optical fiber preform is a method for producing an optical fiber preform comprising a core part and a clad part and composed of a quartz glass. The method comprises an alkali metal addition step of adding an alkali metal to an area adjacent to the inner surface of a glass pipe composed of a quartz glass at a maximum concentration of 500 ppm or more, an etching step of, subsequent to the alkali metal addition step, allowing an SF6 gas and a chlorine gas to flow through the inside of the glass pipe to achieve gas-phase etching of the inner surface of the glass pipe, and a solidification step of, subsequent to the etching step, solidifying the glass pipe to produce a glass rod. Using the glass rod produced in the solidification step, an optical fiber preform can be produced.

More Like This:

JPH03261631	PRODUCTION OF OPTICAL FIBER PREFORM
JP2001089179	PRODUCTION DEVICE OF POROUS PREFORM FOR OPTICAL FIBER
JPS6172646	MANUFACTURE OF OPTICAL WAVEGUIDE TUBE

Inventors:

TAMURA YOSHIAKI (JP)
HARUNA TETSUYA (JP)
HIRANO MASAAKI (JP)

Application Number:

PCT/JP2012/082371

Publication Date:

August 01, 2013

Filing Date:

December 13, 2012

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SUMITOMO ELECTRIC INDUSTRIES (JP)

International Classes:

C03B37/014; C03B37/00; C03B37/02; G02B6/00; C03C13/04

Domestic Patent References:

WO1998002389A1

1998-01-22

Foreign References:

JP2005250025A	2005-09-15
JP2005537210A	2005-12-08
JP2005537210A	2005-12-08
US20060130530A1	2006-06-22
JP2007504080A	2007-03-01
JP2008536190A	2008-09-04
JP2010501894A	2010-01-21
JP2009541796A	2009-11-26
JP2010526749A	2010-08-05
US5146534A	1992-09-08

Other References: