Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Axel Scherer0
Jeremy Witzens0
Date of Patent
July 8, 2008
0Patent Application Number
111193800
Date Filed
April 29, 2005
0Patent Citations Received
Patent Primary Examiner
Patent abstract
An apparatus and method for increasing efficiency of grating couplers are disclosed. The apparatus through the use of a defect or a reflective element allows coupling of light around a normal or nearly normal angle with a high efficiency. The method disclosed teaches how to increase the efficiency of a grating coupler through the use of a defect or a mirror. The apparatus and method can be of particular utility in the context of optical clocking implemented with a III-V chip flip-chip bonded on a CMOS chip.
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