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:
Sep. 06, 2022
Filed:
Mar. 12, 2021
Furukawa Electric Co., Ltd., Tokyo, JP;
Minoru Kasahara, Tokyo, JP;
Yoshihiro Arashitani, Tokyo, JP;
Kouji Mochiduki, Tokyo, JP;
Masahiro Yabe, Tokyo, JP;
FURUKAWA ELECTRIC CO. LTD., Tokyo, JP;
Abstract
Provided is a coated optical fiber and an optical fiber cable capable of suppressing transmission loss (microbend loss) even in an optical fiber having high microbend sensitivity. In the present invention, the degree of freedom of a primary layerrepresented by the equation (I) and the rigidity of a secondary layerrepresented by the equation (II) are set in specific ranges, respectively. Thus, the present invention provides a coated optical fibercapable of suppressing the transmission loss even when an optical fiberhaving high microbend sensitivity such as a BI fiber having a large effective core cross-sectional area Aof an optical fiber is used. The present invention can be widely used as a coated optical fiberconstituting a coated optical fiber ribbon or as a coated optical fiberhoused in an optical fiber cable. Further, an optical fiber cable including such coated optical fibersenjoys the effect of the above-described coated optical fiber[Math. 1]β≥600  (I)()×()≤1,000  (II)