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. 10, 2004
Filed:
Jun. 28, 2002
Hideaki Takano, Kokubunji, JP;
Masahiko Kobayashi, Hitachi, JP;
Other;
Abstract
An optical circuit device makes lightwaves respectively having different wavelengths fall on a filter at different incident angles, respectively. The optical circuit device includes a filter, a mirror and a planar lightwave circuit provided with grooves holding the filter and the mirror therein, and an optical waveguide. The optical waveguide has a receiving part that guides a lightwave to the filter, a multipath reflection part in which the lightwave is reflected repeatedly, and an emitting part that guides lightwaves transmitted by the filter to an emitting end surface. The lightwave falls on the filter at least at two incident angles. The multipath reflection part is provided with a bend waveguide. The filter and the mirror are disposed substantially parallel to each other.