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:
Apr. 29, 2003
Filed:
Aug. 02, 2001
Applicant:
Inventors:
Hisato Uetsuka, Hitachi, JP;
Masahiro Okawa, Hitachi, JP;
Koichi Maru, Hitachi, JP;
Takafumi Chiba, Hitachi, JP;
Assignee:
Hitachi Cable Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/34 ;
U.S. Cl.
CPC ...
G02B 6/34 ;
Abstract
The present invention relates to an array waveguide grating and a method of manufacture thereof, in which a substantially smooth wavelength-loss characteristics is obtained in a pass band, rather than increasing the loss. In an array waveguide grating ( ), wavelength multiplex division signal light is demultiplexed by a channel waveguide array ( ), reflected by a Fabry-Perot resonator array ( ), and passed through the channel waveguide array ( ) again, so that a substantially smooth wavelength-loss characteristic is obtained in the pass band, rather than increasing the loss.