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. 11, 2009
Filed:
Nov. 28, 2006
Nobuo Miyadera, Tsukuba, JP;
Rei Yamamoto, Tsukuba, JP;
Nobuo Miyadera, Tsukuba, JP;
Rei Yamamoto, Tsukuba, JP;
Hitachi Chemical Company, Ltd., Tokyo, JP;
Abstract
The present invention provides an optical system with waveguides, which comprises first, second and third optical input/output means (), fourth and fifth multi-mode optical waveguides () each capable of propagating light with plural propagation modes, and optical-filter mounting means () for mounting an optical filter () between the fourth and fifth multi-mode optical waveguides () across a traveling direction of light in the fourth and fifth multi-mode optical waveguides (). The first optical input/output means () is connected to an end face of the fourth multi-mode optical waveguide () on a side thereof opposite to the optical-filter mounting means (). Each of the second and third optical input/output means () is connected to an end face of the fifth multi-mode optical waveguide () on a side opposite to the optical-filter mounting means (). Respective widths in a direction orthogonal to the light-traveling direction of the fourth and fifth multi-mode optical waveguides () are different from each other.