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:
Nov. 28, 2023
Filed:
Dec. 12, 2022
Sumitomo Electric Industries, Ltd., Osaka, JP;
Tetsuya Hayashi, Osaka, JP;
Tetsuya Nakanishi, Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
An MCF having a structure excellent in mass productivity and suppressing increases in splicing cost and loss are provided. The MCF includes 12 or 16 cores, a cladding, and a coating. The cores are arranged at positions of line symmetry while no adjacent relationship is established between the cores having an adjacent relationship with any core. A coating diameter is 235-265 μm, a cladding diameter CD is from CD−1 μm to CD+1 μm with a nominal value CDof 195 μm or less, an MFD at 1310 nm is from MFD-reference-value −0.4 μm to the MCF-reference-value+0.4 μm with the MFD-reference-value of 8.2-9.2 μm, and a 22 m-cable-cutoff wavelength λis 1260-1360 nm. A core's zero-dispersion wavelength is a wavelength-reference-value −12 nm to the wavelength-reference-value+12 nm with the wavelength-reference-value of 1312-1340 nm, and a dispersion slope at the wavelength is 0.092 ps/(nm·km) or less. A shortest distance from a cover-cladding interface to each core center, a structure, and optical characteristics satisfy predetermined conditions.