US Patent 7970243 Optical device, optical coupler and integrated circuit

Patent 7970243 was granted and assigned to Panasonic on June, 2011 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Panasonic

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

79702430

Patent Inventor Names

Hidenobu Hamada0

Date of Patent

June 28, 2011

Patent Application Number

123366270

Date Filed

December 17, 2008

Patent Primary Examiner

Charlie Peng

Patent abstract

The present invention provides an MMI optical device that can prevent a possible decrease in transmission rate in spite of miniaturization and integration. The optical device includes a rectangular multimode waveguide and an electromagnetic wave absorber of a light source wavelength. The electromagnetic wave absorber is located on at least one side surface of the rectangular multimode waveguide and is located at a predetermined gap from a core of the rectangular multimode waveguide.

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