Patent ID: 7164824
Filing Date: 2007-01-16
Classification: G02B

Abstract:
1. An optical device, comprising a first waveguide optically coupled to a second waveguide by a first reflective surface, wherein: each waveguide comprises a core region and a cladding region formed on a substrate, wherein the first reflective surface is a side of a first trench adjacent to the core regions of the first and second waveguides, wherein the side is covered with a reflective coating; the first and second waveguides are oriented with respect to one another at an angle other than 180 degrees; the first reflective surface has a substantially parabolic shape that has no plane of symmetry orthogonal to the substrate plane; the first reflective surface is adapted to direct light from the first waveguide to the second waveguide; the device further comprises a third waveguide optically coupled to the second waveguide by a second reflective surface, wherein: