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:
Oct. 19, 2010
Filed:
Dec. 18, 2006
Nobuo Miyadera, Tsukuba, JP;
Rei Yamamoto, Tsukuba, JP;
Shigeyuki Yagi, Tsukuba, JP;
Hitachi Chemical Company, Ltd., Tokyo, JP;
Abstract
An optical waveguide structure comprises a substrate () having first and second groove arrays (), including grooves (--), and an optical waveguide (), having cladding and core () layered on the substrate between the groove arrays to vertically align the core with cores () of optical fibers () positioned on the grooves. The waveguide has at least one first port () aligned with a groove () of the first groove array and at least one second port () aligned with a groove () of the second groove array. The number of second ports is equal to or greater than that of the first ports. A ratio of the number of grooves of the second groove array relative to the number of grooves of the first groove array is less than a ratio of the number of the second ports relative to the number of first ports.