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. 27, 2024
Filed:
Aug. 23, 2022
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
The present invention satisfies at least one of the condition of the degree of freedom of a primary layershown in the equation (I) and the condition of the rigidity of a secondary layershown in the equation (II). Thus, a coated optical fibercapable of suppressing transmission loss in a low temperature environment is provided, in which, even when an optical fiberhaving a large effective core cross-sectional area Aof the optical fiberat a wavelength of 1550 nm and having high microbend sensitivity is used, transmission loss in a low temperature environment can be suppressed.[Math. 1]β<600 (I)()×()≤1000 (II)