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:
Dec. 06, 2016
Filed:
Oct. 31, 2013
Fujikura Ltd., Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Osaka Prefecture University Public Corporation, Sakai-shi, Osaka, JP;
National University Corporation Shimane University, Matsue-shi, Shimane, JP;
Shoichiro Matsuo, Sakura, JP;
Katsuhiro Takenaga, Sakura, JP;
Kentaro Ichii, Sakura, JP;
Hirotaka Ono, Mito, JP;
Kyouzou Tsujikawa, Tsukuba, JP;
Makoto Yamada, Sakai, JP;
Hiroji Masuda, Matsue, JP;
FUJIKURA LTD., Tokyo, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
OSAKA PREFECTURE UNIVERSITY PUBLIC CORPORATION, Sakai-shi, Osaka, JP;
NATIONAL UNIVERSITY CORPORATION SHIMANE UNIVERSITY, Matsue-shi, Shimane, JP;
Abstract
A plurality of coresis disposed around the center axis of a first claddingin a state in which an inter-core distance Λ of cores adjacent to each other is equal, a refractive index nof the coreis provided higher than a refractive index nof the first cladding, and the refractive index nof the first claddingis provided higher than a refractive index nof a second cladding. Moreover, 5.8≦Λ/MFD(2λc/(λc+λop))≦8 is satisfied, where the inter-core distance is defined as Λ, a mode field diameter of the core is defined as MFD, a cutoff wavelength is defined as λc, and a wavelength of communication light incident on the coreis defined as λop.