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:
Aug. 31, 2004
Filed:
Oct. 01, 2002
Shinji Ishikawa, Yokohama, JP;
Masakazu Shigehara, Yokohama, JP;
Michiko Takushima, Yokohama, JP;
Tadashi Enomoto, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
An optical fiber grating device is a device in which a long period grating is formed in a core region of an optical fiber consisting of the core region having a refractive index n and an outside diameter , a first cladding region surrounding the core region and having a refractive index n and an outside diameter , and a second cladding region surrounding the first cladding region and having a refractive index n and an outside diameter . There is a magnitude relation of n >n >n among the refractive index n of the core region , the refractive index n of the first cladding region , and the refractive index n of the second cladding region , a relative refractive index difference &Dgr;n of the first cladding region to the second cladding region is not less than 0.5%, and a thickness (c−b) of the second cladding region with respect to a transmission loss peak wavelength &lgr; is in a range of not less than &lgr; nor more than 10&lgr;.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile