Abstract: A pulsed laser device including: a III-V-on-silicon type hybrid pulsed laser source, including a gain section and a saturable absorber section which rest on a photonic substrate, and a longitudinal waveguide located in the photonic substrate; a control optical device including an optical pulse emitter source and a lateral waveguide located in the photonic substrate; the waveguides being sized so that the confinement factor ?lae/SA, ?lai/G in the quantum wells of the corresponding section of the optical mode of the lateral waveguide is higher than the confinement factor IL/ms, in the quantum wells of the semiconductor medium, of the optical mode of the longitudinal waveguide.

Abstract: An optoelectronic device including a substrate including a silicon waveguide, a III-V structure forming a first waveguide and including a first layer, for example, -n doped, an optically active layer, a second layer, for example, -p doped, and an intermediate layer based on of a III-V material configured to form an effective refraction index waveguide comprised between the effective refraction index of the first waveguide, and the effective refraction index of the silicon waveguide, so as to obtain an optical coupling between the first waveguide and the intermediate waveguide, and an optical coupling between the intermediate waveguide and the silicon-based waveguide.

Abstract: A phased-array optoelectronic emitter includes a laser chip containing a flared laser source and a photonic chip containing phase shifters and elementary transmitters placed in N arms. The photonic chip includes a coupler that ensures optical coupling between the flared laser source and the arms, the coupler having a collection input placed facing the emission surface of the flared laser source and a transmission output comprising N rectilinear waveguides that are coupled to the N arms of the optoelectronic emitter and that are oriented so that their longitudinal axes are secant at a position located in a flared section of the laser source on an optical axis of the laser source.

Abstract: Laser emission device integrated into a substrate, comprising: a primary waveguide formed in the substrate and extending from a primary reflector; a plurality of secondary waveguides optically connected to the primary waveguide, and extending between a coupling end, optically connected to the primary waveguide, and a secondary reflector; the device being characterized in that each secondary waveguide comprises a gain medium, connected to a laser-pumping system and placed between the coupling end and the secondary reflector of said secondary waveguide so that the device forms as many Fabry-Pérot cavities as secondary waveguides; the device comprising an extractor, for extracting light from the device, at the resonant wavelength. FIG. 2.

Abstract: A phased-array optoelectronic emitter includes a laser chip containing a flared laser source and a photonic chip containing phase shifters and elementary transmitters placed in N arms. The photonic chip includes a coupler that ensures optical coupling between the flared laser source and the arms, the coupler having a collection input placed facing the emission surface of the flared laser source and a transmission output comprising N rectilinear waveguides that are coupled to the N arms of the optoelectronic emitter and that are oriented so that their longitudinal axes are secant at a position located in a flared section of the laser source on an optical axis of the laser source.

Abstract: A pulsed laser device including: a III-V-on-silicon type hybrid pulsed laser source, including a gain section and a saturable absorber section which rest on a photonic substrate, and a longitudinal waveguide located in the photonic substrate; a control optical device including an optical pulse emitter source and a lateral waveguide located in the photonic substrate; the waveguides being sized so that the confinement factor ?lae/SA, ?lai/G in the quantum wells of the corresponding section of the optical mode of the lateral waveguide is higher than the confinement factor IL/ms, in the quantum wells of the semiconductor medium, of the optical mode of the longitudinal waveguide.

Abstract: A device, includes: a ring waveguide; a diode comprising a junction extending at least partly in the ring waveguide; and a first circuit configured to supply a signal representative of a leakage current in the diode.

Abstract: A device, includes: a ring waveguide; a diode comprising a junction extending at least partly in the ring waveguide; and a first circuit configured to supply a signal representative of a leakage current in the diode.

Abstract: A device, includes: a ring waveguide; a diode comprising a junction extending at least partly in the ring waveguide; and a first circuit configured to supply a signal representative of a leakage current in the diode.

Abstract: The invention relates to an optoelectronic switch comprising: a Mach-Zehnder interferometer (10); a switching device (20) comprising: at least two thermo-optical phase-shifters (21a, 21b), and a switching module (22) designed to apply a continuous signal, referred to as switching signal, of constant intensity to the thermo-optical phase-shifters (21a, 21b); at least two electro-refractive phase-shifters (23a, 23b), and a compensation module (24) designed to apply a transient signal, referred to as compensation signal, of variable intensity to the electro-refractive phase-shifters (23a, 23b).

Abstract: A device, includes: a ring waveguide; a diode comprising a junction extending at least partly in the ring waveguide; and a first circuit configured to supply a signal representative of a leakage current in the diode.

Abstract: A reflective light-emitting device is provided for a WDM PON optical access network. The device includes a light source with an optical gain medium. The light-emitting device includes a light source with an optical gain medium, of wavelength that is self-seeding during a go-and-return passage of light between the optical gain medium and an optical reflective component defining the laser cavity. The optical reflective component is made up of an optical amplifier associated reflective optical connection to a polarizing device so that the polarization axis of the reflected light is the same as the polarization axis of the emitted light.

Abstract: The invention relates to a method for retransmitting a probe signal, implemented by a device in a remote terminal (RT) connected to a central terminal (CT) by a monofibre optical line (MFOL), the probe signal being received by the remote terminal (RT) and having a predetermined wavelength (?probe), the central and remote terminals exchanging over said optical lines useful data signals (?d, ?u) having wavelengths other than those of the probe signal, including the following steps: receiving the polarised probe signal at a first polarity (P1); retransmitting the probe signal over the monofibre line toward the central terminal; and, prior to the retransmission step, a step of switching the first polarity (P1) of the probe signal to a second polarity (P2).

Abstract: A line termination device for an optical network able to receive at least one optical signal at least a part of which is polarized according to a particular axis of polarization, said device comprising: means for modifying the axis of polarization of the part of the optical signal, means for modulating the part of the optical signal of which the axis of polarization has been modified, comprising a modulator able to suppress the optical carrier of the optical signal, the modification means being devised so as to modify an axis of polarization of a part of the modulated optical signal.

Abstract: An optical signal transmission apparatus for transmitting a plurality of data signals comprising a plurality of inputs for receiving a respective one of the data signals and delivering the respective data signal with a controlled phase and at a controlled data rate. A plurality of optical carrier signals having different wavelength is generated. Each of a plurality of first modulators is operative for modulating a respective one of the optical carriers with a respective data signal to provide a first-modulated optical carrier signal. An optical signal-routing device has a plurality of input ports, each port being for receiving a respective one of the first-modulated optical carrier signals and delivering it to the output port of the device.

Abstract: An optical signal transmission apparatus for transmitting a plurality of data signals comprising a plurality of inputs for receiving a respective one of the data signals and delivering the respective data signal with a controlled phase and at a controlled data rate. A plurality of optical carrier signals having different wavelength is generated. Each of a plurality of first modulators is operative for modulating a respective one of the optical carriers with a respective data signal to provide a first-modulated optical carrier signal. An optical signal-routing device has a plurality of input ports, each port being for receiving a respective one of the first-modulated optical carrier signals and delivering it to the output port of the device.

Abstract: A hybrid optical fiber comprises a first fiber section comprising a fiber or a concatenation of fibers having first dispersion characteristics at a predetermined operating wavelength and a second fiber section coupled to the first fiber section to form the hybrid fiber. The first fiber dispersion characteristics are selected to maintain the signal dispersion within desired limits, whereas the second fiber is optimised for low loss. Dispersion compensation is provided in the first section of the fiber span where the signal intensity is highest, and therefore the region of the fiber span where these non-linearities have greatest effect. In the second section of the fiber span, the non-linear effects can be ignored, so it is optimised for low loss rather than for dispersion compensation.