Patent ID: 7024087
Filing Date: 2006-04-04
Classification: G02B

Abstract:
1. An optical waveguide comprising: a first substrate having a plane on which an optical-waveguide groove is formed, said first substrate having a first refractive index; a second substrate having a second refractive index; and, a material layer formed by a material having a further refractive index higher than said first and said second refractive indices, said material layer disposed between said second substrate and said plane of said first substrate, said second substrate is bonded to said plane of said first substrate on which said optical-waveguide groove is formed by said material of said material layer, said optical-waveguide groove is filled with said material, and the first refractive index of said first substrate is different from the second refractive index of said second substrate, said first refractive index being different from said second refractive index to reduce propagation of wave-guiding light through said material layer in a portion of said material layer other than said optical-waveguide groove.