Abstract: A switch based on a phase change material including: a region in said phase change material that couples the first and second conductive electrodes of the switch; and a waveguide including a first end in line with a face of the region in said phase change material and a second end, opposed to the first end, designed to be illuminated by a laser source.

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 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: 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.