Integrated optics polarizing device

An integrated optical structure polarizing device of the type operating by spatial polarization separation, comprising a flat substrate formed from a material having a first refraction index for a light wave polarized in a first direction and a second refraction index for a light wave polarized in a second direction orthogonal to said first direction, said substrate including:

• a first wave guide region formed by doping the material of the substrate to modify said refraction indices so as to obtain guided mode propagation of a light wave injected into said first region;
• and
• at least a second region interacting with the wave guided by the first region, and having refraction indices for the waves polarized in said first and second directions satisfying simultaneously the two following relationships:
• n.sub.1e >n.sub.1I and n.sub.2e <n.sub.2I, in which n.sub.1e and n.sub.2e are effective refraction indices associated with waves guided by the first region, polarized respectively in the first and second directions, and n.sub.1I and n.sub.2I are the corresponding refraction indices of each second region, so as to allow the guided mode propagation, in the first region, of a wave polarized in the first of said directions and to cause extinction of a wave polarized in the second of said directions, and second region being located in proximity to said first region but noncoextensive therewith.