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:
Sep. 29, 2020
Filed:
Jul. 04, 2017
Applicant:
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Inventors:
Takayoshi Mori, Tsukuba, JP;
Taiji Sakamoto, Tsukuba, JP;
Takashi Yamamoto, Tsukuba, JP;
Kazuhide Nakajima, Tsukuba, JP;
Masaki Wada, Tsukuba, JP;
Azusa Urushibara, Tsukuba, JP;
Assignee:
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04J 14/04 (2006.01); H04B 10/2581 (2013.01); G02B 6/02 (2006.01); H04B 10/50 (2013.01); H04B 10/60 (2013.01);
U.S. Cl.
CPC ...
H04B 10/2581 (2013.01); G02B 6/02019 (2013.01); H04B 10/50 (2013.01); H04B 10/60 (2013.01);
Abstract
The optical fiber according to the present disclosure is an optical fiber having a pure silica core which is a step index core through which an LPm1 mode with an effective area of 250 μmor more is propagated by setting a relative refractive index difference to 0.60% or less, considering an effective cutoff condition, and only 2 or more modes or the LPm1 mode are propagated, with the optical fiber as the transmission line.