Abstract: A method for producing an energy storage cell is provided. According to the method, a housing having a base, a tapping plate, and a wound electrode assembly are provided. The wound electrode assembly is connected to the tapping plate, and the tapping plate, which is connected to the wound electrode assembly, is arranged in the housing. The tapping plate and the base of the housing are connected to each other via laser beam welding.

Abstract: The invention provides an optical particle sensor (1) comprising: at least one light source (2, 2r, 2g, 2b) configured to emit light rays (20), at least one channel (3) intended to receive a fluid transporting at least one particle (30), and to at least partially receive the light rays (20) emitted by the at least one source (2, 2r, 2g, 2b), such that said light rays (20) are partially scattered by the at least one particle (30), at least one photodetector (4) capable of receiving said scattered light rays (20), said sensor (1) being characterised in that the at least one source (2, 2r, 2g, 2b) has an emission face (21) facing one side (D) of the sensor and in that the at least one photodetector (4) has a receiving face (41) facing the same side (D) of the sensor (1), such that the light rays received by the at least one photodetector are light rays (20b) backscattered by the at least one particle (30), for at least 90% of them.

Abstract: An optical particle sensor includes-at least one light source configured to emit light rays; at least one channel intended to receive a fluid transporting at least one particle, and to at least partially receive the light rays emitted by the at least one source such that said light rays are partially scattered by the at least one particle; and at least one photodetector capable of receiving said scattered light rays. The at least one source has an emission face facing one side of the sensor and the at least one photodetector has a receiving face facing the same side of the sensor, wherein the light rays received by the at least one photodetector are light rays backscattered by the at least one particle, for at least 90% of the light rays.

Abstract: A photodiode which includes a core of a first waveguide that terminates in a tapered termination that extends above a core, made of germanium or of SiGe, of a second waveguide, a matching strip that extends opposite the tapered termination on one side and opposite the core of the second waveguide on the opposite side, this matching strip being coupled optically to the core of the second waveguide by an evanescent coupling and including a first zone inside which its effective propagation index is equal to the effective propagation index of a second zone of the tapered termination, these first and second zones optically coupling the tapered termination to the matching strip through a modal coupling, and a low-index layer that extends between the matching strip and the tapered termination.

Abstract: An optical coupling device for producing an optical coupling between an optical fiber and photonic circuits. The device includes a substrate and at least two coupling stages integrated on the substrate, and: each coupling stage includes a grating coupler configured to implement an optical coupling centered on a respective central wavelength; the multiple grating couplers are superimposed on top of each other, along an axis orthogonal to the substrate plane; at least one of the grating couplers is insensitive to polarization. The device can form, for example, a wide band coupler, wherein each portion of the spectrum is coupled by a coupling stage. As an alternative, such a device can form an emitting and receiving coupler, where emission and reception spectra are each coupled by a respective coupling stage.

Abstract: A device for emission of an electromagnetic wave front designed to be connected in use to a light source emitting a light beam, and including at least three emission waveguides, each including a straight segment that receives one or several optical power extraction elements; and on the input side of each of the straight segments, a phase shift element and an optical coupler with an adjustable coupling ratio. At least two straight segments extend along straight lines that are not parallel to each other. An orientation of a principal emission beam is selected, defined in far field, by adjusting the coupling ratio of each of the optical couplers and the phase shift introduced by phase shift elements receiving the optical power. The invention is particularly advantageous in the context of remote detection.

Abstract: An optical coupling device for producing an optical coupling between an optical fiber and photonic circuits. The device includes a substrate and at least two coupling stages integrated on the substrate, and: each coupling stage includes a grating coupler configured to implement an optical coupling centered on a respective central wavelength; the multiple grating couplers are superimposed on top of each other, along an axis orthogonal to the substrate plane; at least one of the grating couplers is insensitive to polarization. The device can form, for example, a wide band coupler, wherein each portion of the spectrum is coupled by a coupling stage. As an alternative, such a device can form an emitting and receiving coupler, where emission and reception spectra are each coupled by a respective coupling stage.

Abstract: A device for emission of an electromagnetic wave front designed to be connected in use to a light source emitting a light beam, and including at least three emission waveguides, each including a straight segment that receives one or several optical power extraction elements; and on the input side of each of the straight segments, a phase shift element and an optical coupler with an adjustable coupling ratio. At least two straight segments extend along straight lines that are not parallel to each other. An orientation of a principal emission beam is selected, defined in far field, by adjusting the coupling ratio of each of the optical couplers and the phase shift introduced by phase shift elements receiving the optical power. The invention is particularly advantageous in the context of remote detection.

Abstract: This method for manufacturing a germanium slow light waveguide includes: producing, in a silicon plate, a cavity the cross section of which, parallel to the plane of the plate, is identical to the horizontal cross section of the slow light waveguide and the bottom of which is located inside the silicon plate; then carrying out an operation of vapor phase epitaxial growth of germanium on the bottom of the cavity until this cavity is completely filled with germanium; and before implementing said epitaxial growth operation, a protective layer is deposited on an upper face of the silicon plate or, after implementing said epitaxial growth operation, the germanium that has grown on said upper face is removed.

Abstract: This photodiode includes: a core of a first waveguide that terminates in a tapered termination that extends above a core, made of germanium or of SiGe, of a second waveguide, a matching strip that extends opposite the tapered termination on one side and opposite the core of the second waveguide on the opposite side, this matching strip being coupled optically to the core of the second waveguide by an evanescent coupling and including a first zone inside which its effective propagation index is equal to the effective propagation index of a second zone of the tapered termination, these first and second zones optically coupling the tapered termination to the matching strip through a modal coupling, and a low-index layer that extends between the matching strip and the tapered termination.

Abstract: This method for manufacturing a germanium slow light waveguide includes: producing, in a silicon plate, a cavity the cross section of which, parallel to the plane of the plate, is identical to the horizontal cross section of the slow light waveguide and the bottom of which is located inside the silicon plate; then carrying out an operation of vapour phase epitaxial growth of germanium on the bottom of the cavity until this cavity is completely filled with germanium; and before implementing said epitaxial growth operation, a protective layer is deposited on an upper face of the silicon plate or, after implementing said epitaxial growth operation, the germanium that has grown on said upper face is removed.

Abstract: A PIN structure semiconductor optical receiver includes first and second electrical contact layers and an intrinsic layer disposed between them. The intrinsic layer includes a stud having a stud axis and a stud cross-section. The first and second contact layers have dimensions in a plane perpendicular to the stud axis that are greater than the stud's cross-section. These layers are also elongated and have longitudinal axes offset angularly relative to each other to minimize facing areas of said electrical contact layers.

Abstract: An optical duplexer intended to receive light at a first optical wavelength and to transmit back light at a second optical wavelength, including, on a substrate, successive layers forming a photoreceptor of the first optical wavelength, a selective filter letting through the first optical wavelength, and a waveguide having a surface including a grating which is transparent for the first optical wavelength and diffracting for the second optical wavelength.

Abstract: An optical device including at least one first optical waveguide coupled to a second optical waveguide of smaller cross-section which penetrates into it on the side of a first end. The first optical waveguide is capable of being coupled with an optical fiber on the side of a second end. A surface of the first optical waveguide includes a diffraction grating capable of introducing-extracting-sending back light into and from the first optical waveguide.

Abstract: A PIN structure semiconductor optical receiver includes first and second electrical contact layers and an intrinsic layer disposed between them. The intrinsic layer includes a stud having a stud axis and a stud cross-section. The first and second contact layers have dimensions in a plane perpendicular to the stud axis that are greater than the stud's cross-section. These layers are also elongated and have longitudinal axes offset angularly relative to each other to minimize facing areas of said electrical contact layers.

Abstract: The invention relates to a device for coupling an optical fiber and a nanophotonic component formed on a first substrate, wherein the device comprises: an intermediate component formed on a second substrate including a first wave guide adapted for receiving light from the optical fiber and for transmitting the same to a first diffraction grating independently from the polarization of the incident light; second and third diffraction gratings formed on the first substrate and coupled to the nanophotonic component, the first diffraction grating being adapted to provide the first and second light beams respectively towards the second diffraction grating and the third diffraction grating, the first and second beams having perpendicular polarizations.

Abstract: Optical device with superimposed photonic circuits, for coupling to an optical waveguide. Said device comprises a substrate (44) and, on said substrate, an integrated photonic circuit (46) adapted to be coupled to at least one optical waveguide (48) which transmits a light signal (50) and for processing said signal. According to the invention, the circuit comprises two superimposed elementary integrated photonic circuits (52, 54), each of which is adapted to be coupled to a given polarization state of the signal and to process this state. The invention applies particularly to optical telecommunications.

Abstract: An integrated optical circuit including an operational submicronic waveguide associated with an operational grating intended for the coupling with an optical fiber, further including an alignment grating, identical to the operational grating, associated with a blind waveguide and arranged at a known distance from the operational grating.

Abstract: An optical duplexer intended to receive light at a first optical wavelength and to transmit back light at a second optical wavelength, including, on a substrate, successive layers forming a photoreceptor of the first optical wavelength, a selective filter letting through the first optical wavelength, and a waveguide having a surface including a grating which is transparent for the first optical wavelength and diffracting for the second optical wavelength.

Abstract: A single-mode planar nanophotonic waveguide includes an optical core, a cladding coating the optical core, and a structure for the optical coupling of the core of the waveguide with the core of a single-mode optical fibre. The coupling structure includes an adaptation element including a gradual broadening of the core of the waveguide ending in a broadened region of dimension adapted to the core of the optical fibre; and a light transmission element, optically connected to the broadened region, and defining a plane coupling surface by which light is transmitted to the optical fibre, the optical coupling ratio through the surface when the surface is in contact with the air being maximum for a predetermined coupling angle (?) of the light relative to the coupling surface.