Patent ID: 7200303
Filing Date: 2007-04-03
Classification: G02B,G02F,H01S

Abstract:
1. An optical device comprising a pair of planar optical waveguides (POWs) each comprising a planar substrate wafer having a planar surface with at least one optical waveguide buried in the planar surface of the planar substrate wafer the optical waveguide comprising an elongated patterned area lying in a plane parallel to the surface of the planar substrate wafer and formed by diffusion in the substrate wafer of a lower refractive index material, wherein the optical waveguide in one planar substrate wafer has a refractive index profile different from the refractive index profile of the optical waveguide in the other planar substrate wafer and wherein the pair of POWs are bonded together with the planar surfaces of the planar substrate wafers joined so that the elongated patterned area of one POW faces the patterned area of the other POW, the device further characterized in that the patterned area of one POW does not match the patterned area of the other POW.