Abstract: The present invention provides a regenerator device for wavelength division multiplexed optical signals designed to regenerate the N channels of a multiplex simultaneously, the device being characterized in that it comprises at least one regenerator component (112, 152) suitable for coupling the inlet signal with a multiplex of N optical carriers, the regenerator component (112, 152) being constituted by a material presenting a spectrum line with non-uniform broadening so that there is no interaction between the various channels involved within the component.

Abstract: A reflective grating for the optical diffraction of light rays comprises k juxtaposed, grooved, plane sub-gratings, the planes of the sub-gratings being offset in terms of height with respect to one another along the normal to the plane of the reflective surface of the grooves, enabling the difference in optical path of the grating to be reduced to the difference in optical path between the two ends of a sub-grating.

Abstract: Double heterostructure semiconductor laser in which the contact layer is transparent to the spontaneous radiation emitted by the active layer. The upwardly directed light is then reflected by the metal layer and returned to the active layer.