Patent ID: 6768828
Filing Date: 2004-07-27
Classification: G02B

Abstract:
An integrated optical circuit comprising:a substrate; a first cladding layer having a first refractive index positioned on the substrate; a first core layer having a core refractive index including one or more defined waveguiding elements formed on the first cladding layer; a second cladding layer having a second cladding refractive index surrounding the waveguiding elements of the first core layer, the second cladding refractive index and the first cladding refractive index being less than the core refractive index, the second cladding layer being formed through simultaneous cladding material deposition and removal, the ratio of cladding material deposition to cladding material removal being approximately greater than 1 and less than 20 such that the second cladding layer is substantially void-free and substantially self-planarizing, enabling further layers to be directly positioned on the second cladding layer without necessitating intermediate planarization.