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:
May. 11, 2010
Filed:
May. 31, 2006
Jun-fei Zheng, Palo Alto, CA (US);
Kazumi Wada, Lexington, MA (US);
Jurgen Michel, Arlington, MA (US);
Donghwan Ahn, Dorchester, MA (US);
Lionel C. Kimerling, Concord, MA (US);
Jun-Fei Zheng, Palo Alto, CA (US);
Kazumi Wada, Lexington, MA (US);
Jurgen Michel, Arlington, MA (US);
Donghwan Ahn, Dorchester, MA (US);
Lionel C. Kimerling, Concord, MA (US);
Intel Corporation, Santa Clara, CA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
An optical grating is disposed on a waveguide to redirect light from the interior of the waveguide through the opposite side of the waveguide from the grating. In one embodiment the waveguide, the grating, and an optical sensor are combined in a single monolithic structure. In another embodiment, an absorbing layer is directly connected to the waveguide in the region of the grating. In still another embodiment, efficiency of the grating is improved by having a high index contrast between the refractive index of the grating and the refractive index of the cladding disposed over the grating, and by having an appropriately sized discontinuity in the grating.