Patent ID: 6873761

Claim:
A temperature-independent arrayed waveguide grating, comprising at least an input waveguide, an input slab waveguide including an input side and an output side, said input side of said input slab waveguide receiving light from said input waveguide, a plurality of arrayed waveguides including an input side and an output side, said input side of said plurality of arranged waveguides being connected to said output side of said input slab waveguide, an output slab waveguide including an input side and an output side, said input side of said output slab waveguide being connected to said output side of said arrayed waveguides, a plurality of output waveguides connected to said output side of said output slab waveguides; a wedge-shaped groove formed in said arrayed waveguides; and a photosensitive polymer filled in said groove, said photosensitive polymer having a negative refractive index temperature coefficient; wherein said photosensitive polymer disposed in said groove confines light incident to said groove in a vertical and a horizontal direction thereby preventing the light from spreading in said groove.