OPTICAL FIBER PARENT MATERIAL AND METHOD FOR MANUFACTURING OPTICAL FIBER

Title:

OPTICAL FIBER PARENT MATERIAL AND METHOD FOR MANUFACTURING OPTICAL FIBER

Document Type and Number:

WIPO Patent Application WO/2016/111355

Kind Code:

A1

Abstract:

The present invention is an optical fiber parent material provided with a columnar section having a substantially constant radius r, and a tapered section positioned adjacent to the columnar section in the length direction, the radius of the tapered section decreasing along the length direction, the tapered section having a first tapered section having a portion in which the radius thereof varies between 0.9r and 0.6r, and a second tapered section having a portion in which the radius thereof varies between 0.4r and 0.15r, the first tapered section contracting in radius so as to form a maximum angle θ1 with the columnar section of between 40 and 60 degrees in the portion where the radius of the first tapered section varies between 0.9r and 0.6r, the second tapered section contracting in radius so as to form a maximum angle θ2 with the center axis in the length direction of between 5 and 30 degrees in the portion where the radius of the second tapered section varies between 0.4r and 0.15r, and the volume of the tapered section being 45% or less of the volume of a column having the same length and the same outside diameter as the maximum outside diameter of the tapered section.

Inventors:

KAWASAKI MITSUHIRO (JP)

Application Number:

PCT/JP2016/050518

Publication Date:

July 14, 2016

Filing Date:

January 08, 2016

Export Citation:

Click for automatic bibliography generation Help

Assignee:

FURUKAWA ELECTRIC CO LTD (JP)

International Classes:

C03B37/012; C03C19/00; G02B6/02

Foreign References:

JP2002080238A	2002-03-19
JPH1081535A	1998-03-31
JP2001122635A	2001-05-08

Other References: