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:
May. 02, 2006
Filed:
Dec. 09, 2003
Applicant:
Tsuneo Nakahara, Tokyo, JP;
Inventor:
Tsuneo Nakahara, Tokyo, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/20 (2006.01); G01N 23/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical waveguide (optical fiber, for example) having low transmission loss, nonlinearity, and chromatic dispersion and facilitating the termination work for its end portions. An optical fibercomprises a main mediumin which minute regionscomposed of a multitude of submedia are distributed. The main mediumis made of silica glass, for example. The submedium in each minute regionis formed by a vacuum or a gas, such as an inert gas or air. The submedia have a refractive index smaller than that of the main mediumEach minute regiondoes not extend along the axis C.