An integrated optical coupler including in the medium separating a first integrated waveguide from a second substantially parallel integrated waveguide, a succession of strips parallel to one another and orthogonal to the general direction of the waveguides, said strips being made of a material having an absorption preventing the propagation of an electromagnetic wave across its volume, and having: a length H equal to kλ/2nmedium, where k is an integer, λ is the central wavelength used, and nmedium is the optical index of the medium between the waveguides; a period P smaller than λ/2nmedium; and ends at a distance shorter than λ/10 from the waveguides.