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:
Jan. 10, 2017
Filed:
Sep. 11, 2015
Fujikura Ltd., Tokyo, JP;
National University Corp. Hokkaido University, Sapporo-shi, Hokkaido, JP;
Masahiro Kashiwagi, Sakura, JP;
Kunimasa Saitoh, Sapporo, JP;
FUJIKURA LTD., Tokyo, JP;
NATIONAL UNIVERSITY CORP. HOKKAIDO UNIVERSITY, Sapporo-shi, Hokkaido, JP;
Abstract
There is provided a photonic bandgap fiber used in a state in which at least a part of the photonic bandgap fiber is bent at radii of 15 cm or greater and 25 cm or less. A large number of high refractive index portionsare disposed in a nineteen-cell core type in three layers, and a V value is 1.5 or greater and 1.63 or less. In the high refractive index portions, conditions are defined that a relative refractive index difference is Δ% and a lattice constant is Λ μm so as to remove light in a higher mode at the bent portion as described above.