The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 2010
Filed:
Aug. 12, 2004
Atsushi Mori, Atsugi, JP;
Masao Kato, Atsugi, JP;
Kouji Enbutsu, Atsugi, JP;
Shinichi Aozasa, Atsugi, JP;
Kiyoshi Oikawa, Atsugi, JP;
Takashi Kurihara, Atsugi, JP;
Kazuo Fujiura, Atsugi, JP;
Makoto Shimizu, Mito, JP;
Kouji Shikano, Hakodate, JP;
Atsushi Mori, Atsugi, JP;
Masao Kato, Atsugi, JP;
Kouji Enbutsu, Atsugi, JP;
Shinichi Aozasa, Atsugi, JP;
Kiyoshi Oikawa, Atsugi, JP;
Takashi Kurihara, Atsugi, JP;
Kazuo Fujiura, Atsugi, JP;
Makoto Shimizu, Mito, JP;
Kouji Shikano, Hakodate, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A fabrication method of an optical fiber using as a core material tellurite glass. The method includes a first process of molding a tellurite glass melt into a mold, the mold having a plurality of convex portions defining an inner wall, which portions run parallel to each other in a longitudinal direction in order to make a polygon columnar glass preform, and a second process of inserting the glass preform into a cylindrical jacket tube made of tellurite glass and carrying out fiber-drawing under pressure so as to maintain or enlarge air holes which are gaps generated between the glass preform and the jacket tube.