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:
Jun. 01, 2004
Filed:
Sep. 27, 2001
Applicant:
Inventors:
Yoshinori Takeuchi, Tama, JP;
Shinichi Wakabayashi, Sagamihara, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/34 ;
U.S. Cl.
CPC ...
G02B 6/34 ;
Abstract
An optical wavelength filter having one or more bands of transmission wavelengths of light, within a reflection spectrum of the filter, is formed using a section of an optical fiber as an optical fiber grating. The optical fiber core is configured with a periodically varying diffraction coefficient structure formed such that the grating pitch continuously varies in a fixed direction, with that structure containing one or more regions of interruption of the continuous variation of pitch, whereby the bands of transmission wavelengths are respectively defined by these interruption regions.