Patent ID: 7881571

Claim:
An optical coupling device ( 100 ) intended for optically coupling an optical wave of a first optical component towards a second optical component, said coupling device comprising: a support substrate ( 1 ), a first layer ( 30 ) arranged on the support substrate and comprising first patterns ( 31 ) produced within the thickness of said first layer, said first patterns being arranged in parallel and periodic rows, a second layer ( 50 ) arranged on the first layer ( 30 ) and comprising second patterns ( 51 ) passing through the thickness of said second layer, said second patterns being arranged in parallel and periodic rows, wherein the direction of periodicity of the rows of the first patterns ( 31 ) is perpendicular to the direction of periodicity of the rows of the second patterns ( 51 ), wherein the rows of the first patterns extend over a distance greater than or equal to the wavelength in the void of the optical wave intended to be coupled, wherein the first patterns have a width less than or equal to a tenth of the wavelength of the optical wave intended to be coupled, and the period of these first patterns is between 50 nm and 1 μm, the width being the dimension of a pattern in the direction of periodicity, and wherein the second patterns are arranged so as to form a periodic diffraction grating.