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:
Feb. 07, 2012
Filed:
Aug. 10, 2006
Yasuo Nakajima, Chiyoda-ku, JP;
Hiroki Tanaka, Chiyoda-ku, JP;
Yoshihiro Arashitani, Chiyoda-ku, JP;
Kouji Mochizuki, Chiyoda-ku, JP;
Mitsunori Okada, Chiyoda-ku, JP;
Yasuo Nakajima, Chiyoda-ku, JP;
Hiroki Tanaka, Chiyoda-ku, JP;
Yoshihiro Arashitani, Chiyoda-ku, JP;
Kouji Mochizuki, Chiyoda-ku, JP;
Mitsunori Okada, Chiyoda-ku, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
The present invention provides an optical fiber in which composites constructing its coating are not complicated, so, there is also little constraint in view of production, and, moreover, delamination between a glass optical fiber and a primary layer, and a bubble in the primary layer hardly arise. The optical fiber of the present invention is an optical fiber which has a glass optical fiber which has a core, which passes an optical signal, in a center portion, and a claddingsurrounding this, a primary protective layermade to coat the glass optical fiber, a secondary protective layerapplied on this primary protective layer, and a third protective layerapplied to an outer periphery of this secondary protective layer, wherein glass transition temperature of the primary protective layeris made to be higher than −20° C. and 10° C. or lower, glass transition temperature of the secondary protective layeris made to be −10° C. or less, and the glass transition temperature of the primary protective layeris set higher than that of the secondary protective layer