Patent ID: 8285102
Filing Date: 2012-10-09
Classification: B82Y,G02B

Abstract:
1. Optical waveguide structure, comprising: a supporting substrate, an optical waveguide located on a surface of the supporting substrate, the optical waveguide comprising at least one guide layer having a refractive index n wherein the said at least one guide layer comprises at least one zone having a birefringence of value B, the said zone comprising voids provided in the thickness of the guide layer, the voids being filled with a fluid or material having a refractive index n the width of the voids being equal to or less than one tenth of the wavelength of the optical wave intended to be propagated within the guide layer, the width of a void being the maximum distance between the two opposite edges of a particular void present in a plane perpendicular to the direction of propagation of the optical wave, each void within one row being at a distance from an adjacent void equal to or less than one tenth of the wavelength of the optical wave intended to be propagated within the guide layer, the width of the voids in relation to the distance separating two adjacent voids in two adjacent rows and the refractive index n ff being the filling factor for the material of refractive index n n n