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. 17, 1999
Filed:
Sep. 25, 1997
Applicant:
Inventors:
Kimio Inaba, Ibaraki, JP;
Kenji Akiba, Fukushima, JP;
Assignee:
Hitachi Cable, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; H04J / ;
U.S. Cl.
CPC ...
385 24 ; 385 14 ; 385 37 ; 385 46 ; 359127 ; 359130 ;
Abstract
Provision of a predetermined number of artificial waveguides having a predetermined core width along a plurality of channel waveguides on both sides of an array waveguide diffraction grating can reduce a variation and fluctuation in core width, improving crosstalk characteristics.