Abstract: This oscillator comprises: a source generating an incident optical wave at a pulsation frequency ?; an optomechanical resonator, having optical resonances at the pulsation frequency ? and mechanical resonances at a frequency f1 and generating, from the incident optical wave, emergent optical waves at the pulsation frequencies ? and ??2?f1, and an acoustic wave at frequency f1; and, a photodiode delivering a useful signal at frequency f1 from the emergent waves. This oscillator further comprises: an acoustic propagation means for propagating the acoustic wave over a distance in order to produce a delayed acoustic wave; a means for converting the delayed acoustic wave into a delay signal at the frequency f1; and, a control loop, processing the delay signal in order to obtain a control signal applied to the source.

Abstract: This oscillator comprises: a source generating an incident optical wave at a pulsation frequency ?; an optomechanical resonator, having optical resonances at the pulsation frequency ? and mechanical resonances at a frequency f1 and generating, from the incident optical wave, emergent optical waves at the pulsation frequencies ? and ??2?f1, and an acoustic wave at frequency f1; and, a photodiode delivering a useful signal at frequency f1 from the emergent waves. This oscillator further comprises: an acoustic propagation means for propagating the acoustic wave over a distance in order to produce a delayed acoustic wave; a means for converting the delayed acoustic wave into a delay signal at the frequency f1; and, a control loop, processing the delay signal in order to obtain a control signal applied to the source.

Abstract: The present invention relates to a radiofrequency oscillator comprising an optical resonator being a ring waveguide allowing the propagation of a first wave in a first direction and of a second wave in a second direction, the second direction being opposite to the first direction, and the resonator comprising an active optical medium generating a first optical line from the first wave and a second optical line from the second wave, the resonator being in contact with a part made of a material featuring a magneto-optic effect, an applier of external magnetic field of adjustable intensity on the resonator generating a frequency offset between the first wave and the second wave, and a processing circuit converting the beat between the two optical lines in a radiofrequency signal.

Abstract: The present invention relates to a radiofrequency oscillator comprising an optical resonator being a ring waveguide allowing the propagation of a first wave in a first direction and of a second wave in a second direction, the second direction being opposite to the first direction, and the resonator comprising an active optical medium generating a first optical line from the first wave and a second optical line from the second wave, the resonator being in contact with a part made of a material featuring a magneto-optic effect, an applier of external magnetic field of adjustable intensity on the resonator generating a frequency offset between the first wave and the second wave, and a processing circuit converting the beat between the two optical lines in a radiofrequency signal.

Abstract: A device for electro-optical sampling of a microwave frequency signal is disclosed. In one aspect, the device includes a microwave transmission line for transmitting a microwave signal, the microwave line including an interruption zone configured to be rendered conducting under the effect of an optical control signal so as to carry out a function of optically controlled interrupter switch. The device also includes, in the interruption zone, a layer of nanostructured semiconductor material, including a periodic or quasi-periodic tiling of nanostructures. The layer of nanostructured semiconductor material is placed, at the level of the interruption zone, in suspension or on a dielectric material of lower refractive index than the refractive index of the semiconductor material, the layer of nanostructured semiconductor material being able to carry out the function of optically controlled interrupter switch.

Abstract: A device for electro-optical sampling of a microwave frequency signal is disclosed. In one aspect, the device includes a microwave transmission line for transmitting a microwave signal, the microwave line including an interruption zone configured to be rendered conducting under the effect of an optical control signal so as to carry out a function of optically controlled interrupter switch. The device also includes, in the interruption zone, a layer of nanostructured semiconductor material, including a periodic or quasi-periodic tiling of nanostructurees. The layer of nanostructured semiconductor material is placed, at the level of the interruption zone, in suspension or on a dielectric material of lower refractive index than the refractive index of the semiconductor material, the layer of nanostructured semiconductor material being able to carry out the function of optically controlled interrupter switch.

Abstract: Exemplary embodiments of an apparatus, method, and computer readable medium are provided for producing a radiation. For example, a radiation having at least one pulse with a pulse-width of less than approximately 30 picoseconds can be produced using a photonic crystal waveguide arrangement which is (i) specifically structured and sized so as to be placed on an integrated circuit, and (ii) configured to produce the radiation having at least one pulse with a pulse-width of less than approximately 30 picoseconds.

Abstract: Exemplary embodiments of an apparatus, method, and computer readable medium are provided for producing a radiation. For example, a radiation having at least one pulse with a pulse-width of less than approximately 30 picoseconds can be produced using a photonic crystal waveguide arrangement which is (i) specifically structured and sized so as to be placed on an integrated circuit, and (ii) configured to produce the radiation having at least one pulse with a pulse-width of less than approximately 30 picoseconds.

Abstract: The invention relates to a photonic crystal circuit comprising a guide produced in a photonic crystal membrane on the surface of a substrate and a mode adapter coupled to said guide, wherein the membrane includes a central point constituting the mode adapter having a section gradient as termination of said guide, said point being suspended so as to allow the propagation of modes in a symmetrical manner. It also relates to an optical system incorporating said circuit coupled to an optical fiber.

Abstract: The invention relates to a photonic crystal circuit comprising a guide produced in a photonic crystal membrane on the surface of a substrate and a mode adapter coupled to said guide, wherein the membrane includes a central point constituting the mode adapter having a section gradient as termination of said guide, said point being suspended so as to allow the propagation of modes in a symmetrical manner. It also relates to an optical system incorporating said circuit coupled to an optical fiber.

Abstract: The invention relates to a photon extractor comprising a photonic-crystal-based membrane having a plane defined by two perpendicular directions, comprising an array of features and a cavity devoid of features, from which photons may be extracted, characterized in that the membrane comprises at least one region close to the cavity, said region having features distributed with a double periodicity (a1, 2a1, a2, 2a2) along at least one direction.

Abstract: The invention relates to an optical device operating within a wavelength range centred on a reference wavelength (?0) and delivering an output signal, characterized in that it comprises a photonic crystal structure having a semiconductor substrate and at least one layer of semiconductor material having, at least locally, an array of features arranged so as to form a resonant optical cavity, said material of the semiconductor layer being a gallium/indium/phosphorus alloy not exhibiting two-photon absorption within the operating wavelength range of said device.