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:
Jul. 08, 2008
Filed:
Feb. 22, 2007
Henry A. Blauvelt, San Marino, CA (US);
David W. Vernooy, Sierra Madre, CA (US);
Joel S. Paslaski, San Gabriel, CA (US);
Henry A. Blauvelt, San Marino, CA (US);
David W. Vernooy, Sierra Madre, CA (US);
Joel S. Paslaski, San Gabriel, CA (US);
HOYA Corporation USA, San Jose, CA (US);
Abstract
A multiple-core planar optical waveguide comprises: a substantially planar waveguide substrate; a lower waveguide core; an upper waveguide core; lower cladding between the substrate and the lower waveguide core; middle cladding between the waveguide cores; and upper cladding above the upper waveguide core. Overlapping portions of the waveguide cores are positioned one above the other and substantially parallel. The lower, middle, and upper claddings have refractive indices less than refractive indices of the lower and upper waveguide cores. The widths of the waveguide cores are substantially larger their thicknesses along their overlapping portions. The overlapping portions of the waveguide cores jointly support a propagating optical mode.