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. 04, 2006
Filed:
May. 14, 2003
Takeo Komiya, Yokohama, JP;
Takashi Sasaki, Yokohama, JP;
Takeo Komiya, Yokohama, JP;
Takashi Sasaki, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
In a planar-waveguide-type optical circuit, a reflection filteris placed inside an oblique grooveformed to traverse optical waveguides. Reflected light from the reflection filteris detected by photodetectorsof a photodetector array, and thereby light intensity of signal light is monitored. A glass substrate made of glass material having a refractive index substantially identical to that of a coreof the optical waveguideand filter fixing resinfixing the reflection filteris used for a substrateof the optical circuitconstituting part of the groove. This inhibits reflection of light in various regions of the groove, thereby reducing generation of extra scattered light inside the grooveand its confinement. An optical waveguide module capable of enhancing monitoring characteristics of the signal light is thus realized.