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:
Feb. 21, 2006
Filed:
Mar. 02, 2004
Takahiro Sunaga, Kanagawa, JP;
Makoto Katayama, Kanagawa, JP;
Tomohiko Kanie, Kanagawa, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
An optical switch is provided in which the difference of the optical loss due to the difference of optical path can be reduced. The optical switch comprises the first switching partsA–D and the second switching partsA–D. The first switching partsA–D each comprise: a planar waveguide devicein which four coupling optical waveguidesand an input optical waveguideare provided; and reflection mirrorsfor reflecting a light signal incident from the input optical waveguideto the respective coupling optical waveguides, respectively. The second switching partsA–D each comprise: a planar waveguide devicein which coupling optical waveguidesand an output optical waveguideare provided; and reflection mirrorsfor reflecting a light signal incident from the respective coupling optical waveguidesto the output optical waveguide. The optical switch is provided withoptical fibersfor connecting the coupling optical waveguidesof the first switching partsA–D to the different second coupling optical waveguidesof the second switching partsA–D, respectively.