Patent ID: 6504971
Filing Date: 2003-01-07
Classification: G02B

Abstract:
An integrated optical device comprising at least one structure having at least one waveguiding element, the device comprising:a basic structure containing a substrate material carrying a buffer material layer coated with a core material layer of a higher refraction index as compared to that of the buffer layer; said at least one waveguiding element formed in a guiding layer on top of said basic structure, wherein said guiding layer is made of a material with a refractive index higher than the refractive index of said buffer layer and the core layer, and is chosen so as to minimize a height of said at least one waveguiding element and to provide effective guiding of light in the core layer; a cladding layer on top of a structure with said at least one waveguiding element, wherein a height difference between a height of the top cladding layer region above said at least one waveguiding element and a height of the cladding layer region outside the waveguiding element is substantially small, the top cladding layer thereby having a desired flatness.