Patent ID: 7725000
Filing Date: 2010-05-25
Classification: B82Y,G02B

Abstract:
1. A method for trimming an effective refractive index of an optical waveguiding structure, the optical waveguiding structure comprising one or more ridges made of a core material adjacent to a layer of cladding material, the cladding material being a compactible material, and a portion of the layer of cladding material is on top of the one or more ridges, wherein the portion of the layer of cladding material on top of the one or more ridges is less than 50 nm thick, and wherein the method comprises the steps of: defining a compaction area on the cladding material next to at least one of the one or more ridges; and compacting the cladding material by irradiation of the cladding material in said compaction area to create a strain in the core material of the at least one ridge, whereby the effective refractive index is trimmed.