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:
Jan. 01, 2008
Filed:
Nov. 22, 2004
Tomohiko Kanie, Yokohama, JP;
Makoto Katayama, Yokohama, JP;
Tomohiko Kanie, Yokohama, JP;
Makoto Katayama, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
An optical variable attenuatorhas a planar waveguideand an actuator structureThe planar waveguideis provided with an input optical waveguide coreA for input of an optical signal, an output optical waveguide coreB for outputting an optical signal from the optical waveguide coreA, and an a movable mirror optical waveguide coreC for guiding light that does not enter the optical waveguide coreB, out of the optical signal from the optical waveguide coreA. The actuator structurehas a movable mirrorfor reflecting the optical signal emerging from the input optical waveguide coreA, toward the output optical waveguide coreB. A light receiving devicefor receiving light passing the optical waveguide coreC is provided at one end face of the planar waveguide