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. 05, 2019
Filed:
May. 08, 2018
Sumitomo Electric Industries, Ltd., Osaka-shi, Osaka, JP;
Yoshinori Yamamoto, Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka-shi, Osaka, JP;
Abstract
An optical fiber includes a core having a maximum refractive index n, and cladding provided around the core and having a refractive index nthat is lower than the maximum refractive index n. A radial refractive-index profile of the core is expressed with an exponent α that is 1.5 to 10. A relative refractive-index difference Δat a center of the core that is expressed as Δ=100×(n−n)/(2n) is 0.3% to 0.5%. A diameterof the core is 9 μm to 14 μm. A zero-dispersion wavelength is 1300 nm to 1324 nm. A cable cutoff wavelength λcc is 1260 nm or shorter. A bending loss at a wavelength of 1550 nm in a case where the optical fiber is wound by ten turns with a bend diameter of 30 mm is 0.25 dB or smaller.