Abstract: An optoelectronic integrated semiconductor device including a separator of the polarizations TE and TM, this separator comprising two parallel and monomode optical guides G.sub.1 and G.sub.2, one of which receives at the input a luminous signal, and comprising means for carrying out the separation of this signal and its two components TE and TM, one of which TE is transported to the output through one of the guides and the other component TM is transported to the output through the other guide, characterized in that:the guides are formed by at least a heterostructure S/C.sub.1 and by two parallel erected guiding ribbons R at the surface,and the means for carrying out the separation of the components TE and TM consist of a matallic layer extending between the guiding ribbons at the surface of the structure over a length D, whose value is connected with the coupling length of the component TE by the relationD=L.sub.

Abstract: An optical switching element including two optical guides constituted by linear parallel strips coupled through a distance d and made of semiconductor material having an index n.sub.1 on a semiconductor substrate having an index n.sub.o <n.sub.1 and provided with electrodes E.sub.ii to carry out the switching of the light from one guide to the other, characterized in that the first guide G.sub.ii is connected on the one hand to an input IN.sub.i and on the other hand to a direct output I'.sub.i of the switching element, and in that the second guide H.sub.ii is provided beyond the zone of the electrodes E.sub.ii with a flat mirror M.sub.ii at 45.degree. with respect to its optical axis, which reflects the light into a guide H'.sub.ii perpendicular to H.sub.ii, in that H'.sub.ii is coupled through a distance d to a guide G'.sub.ii, the guides H'.sub.ii and G'.sub.ii being provided with electrodes E'.sub.ii to direct the light towards the output O.sub. i of the guide G'.sub.