Abstract: One embodiment of an optical interferometer includes a first MMI device coupled to a second MMI device via a waveguide. The first MMI device separates a first signal into a guided portion and a diffused portion. The guided portion is transmitted to the second MMI device through the waveguide. At least part of the diffused portion reflects off a reflector towards the second MMI device and is coupled with the guided portion within either the second MMI device or a part of the waveguide proximal to the second MMI device, forming at least part of a second signal. The difference between the propagation times of the guided portion and the at least part of the diffused portion results in constructive or destructive interference between the two portions, allowing specific channels to be added to or dropped from the first signal.

Abstract: The invention concerns semiconductor optoelectronic components with ribbon-shaped waveguide supported by a substrate. According to the invention the ribbon includes lateral sides and a light output face, characterized by said ribbon including a portion curved by more than two degrees in relation to the normal to the light output face, and the lateral sides being inwardly sloped on the substrate. The optoelectronic component may be an electro-optical modulator, a semiconductor optical amplifier, a semiconductor laser or a Mach-Zehnder-type interferometer. The component may also be formed by joining two of these devices.

Abstract: An optoelectronic module comprising at least one optical component placed on a support, said component comprising an active optical layer and at least one confinement layer which carries at least one electrical contact, wherein said module further comprises a thermal sensor comprising a temperature-dependent resistive material which extends over the confinement layer of the optical component, at the side of the electrical contact of said component.

Abstract: One embodiment of an optical interferometer includes a first MMI device coupled to a second MMI device via a waveguide. The first MMI device separates a first signal into a guided portion and a diffused portion. The guided portion is transmitted to the second MMI device through the waveguide. At least part of the diffused portion reflects off a reflector towards the second MMI device and is coupled with the guided portion within either the second MMI device or a part of the waveguide proximal to the second MMI device, forming at least part of a second signal. The difference between the propagation times of the guided portion and the at least part of the diffused portion results in constructive or destructive interference between the two portions, allowing specific channels to be added to or dropped from the first signal.

Abstract: A monolithic integrated component (10) comprises a plurality of sections (21, 22) including a section (21) constituting a laser having a cavity delimited by a partially reflecting reflector and at least one other section (22) adjacent said laser section (21). The partially reflecting reflector (11) is disposed between the laser section (21) and one of the adjacent sections (22) and is a Bragg reflector grating (11) that allows multimode operation of the laser (21).

Abstract: The invention concerns semiconductor optoelectronic components with ribbon-shaped waveguide supported by a substrate. According to the invention the ribbon includes lateral sides and a light output face, characterized by said ribbon including a portion curved by more than two degrees in relation to the normal to the light output face, and the lateral sides being inwardly sloped on the substrate. The optoelectronic component may be an electro-optical modulator, a semiconductor optical amplifier, a semiconductor laser or a Mach-Zehnder-type interferometer. The component may also be formed by joining two of these devices.

Abstract: An optoelectronic module comprising at least one optical component placed on a support, said component comprising an active optical layer and at least one confinement layer which carries at least one electrical contact, wherein said module further comprises a thermal sensor comprising a temperature-dependent resistive material which extends over the confinement layer of the optical component, at the side of the electrical contact of said component.

Abstract: A monolithic integrated component (10) comprises a plurality of sections (21, 22) including a section (21) constituting a laser having a cavity delimited by a partially reflecting reflector and at least one other section (22) adjacent said laser section (21). The partially reflecting reflector (11) is disposed between the laser section (21) and one of the adjacent sections (22) and is a Bragg reflector grating (11) that allows multimode operation of the laser (21).

Abstract: An optical emitter includes an electro-optical modulator which comprises N modulator units optically coupled in series and having N separate control electrodes. The modulator is controlled by an electronic control circuit which delivers N identical electrical signals at N separate outputs, each of which is connected to a respective control electrode of one of the N modulator units.

Abstract: The invention relates to modulator of the Mach-Zehnder type in which an optical wave source is coupled to an optical waveguide separating through a coupler (2) into two branches (B1, B2) which recombine, the branches being respectively provided with electro-optical modulators (4). According to the invention, the coupler (2) has an adjustable coupling ratio, regulation means being provided for adjusting the said coupling ratio following the application of at least one signal (V) to at least one of the electro-optical modulators (4) so that the output optical powers of the branches (B1, B2) are respectively equal for destructive interference conditions and for constructive interference conditions. These regulation means comprise at least one regulation electrode (5). The invention applies principally to optical signal transmission systems.