Optical waveguide device

摘要: An optical waveguide device for coupling an external wave with a guided by means of grating coupler formed on which lies substrate. The is further coated cladding layer. transformed into after being diffracted first coupler, and travels along the to second coupler. then subjected diffraction whereupon minus first-order only toward substrate, whilst other waves higher order are respectively layer totally reflected from boundary furtherst thereby passing through thus interferes same weakening each other.