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:
Mar. 09, 2010
Filed:
Mar. 21, 2008
Thomas W. Mossberg, Eugene, OR (US);
Dmitri Iazikov, Eugene, OR (US);
Christoph M. Greiner, Eugene, OR (US);
Thomas W. Mossberg, Eugene, OR (US);
Dmitri Iazikov, Eugene, OR (US);
Christoph M. Greiner, Eugene, OR (US);
LightSmyth Technologies Inc., Eugene, OR (US);
Abstract
An optical apparatus comprises a set of diffractive elements (trenches between ribs) arranged on a substrate to: receive a diffraction-guided input optical signal from an input port; diffract the input signal as a diffraction-guided output optical signal; and route the output signal to an output port. In one embodiment, a side surface of each trench is perpendicular to its bottom surface and at least one trench depth is equal to half of its width divided by the tangent of a selected Littrow angle. In another embodiment, a side surface of each rib and its bottom surface are arranged to successively reflect a portion of the input optical signal preferentially in a selected output direction. In another embodiment, each diffractive element comprises multiple trenches; selected relative widths or depths of the multiple trenches of each diffractive element at least partly determining diffractive amplitude and a selected blaze direction.