Abstract: The present invention relates to a particle detector comprising at least an optical device configured to emit a luminous radiation; and a substrate extending in a plane and defining a channel intended to receive particles, the channel extending principally in a direction perpendicular to the principal plane; characterised in that the detector comprises a matrix of photo detectors and a reflecting surface; the matrix of photo detectors and the reflecting surface being disposed on mutually parallel planes and situated on either side of said portion of the substrate so that a part of the luminous radiation passes through the channel by being diffracted by a particle, then reflects off the reflecting surface, and then reaches the matrix of photo detectors.

Abstract: The invention relates to an optical coupler (10) in a vertical configuration, capable of working for a wavelength and comprising a first waveguide (12) and a second waveguide (14). The second waveguide (14) has a patterning (33) in the form of a series of patterns (36), the patterns (36) extending along a transverse direction (X) perpendicular to the longitudinal direction (Z), being parallel to each other and orthogonal to the general direction of the first waveguide (12), each pattern (36) being arranged both in the core (30) and the cladding (32) of the second waveguide (14) and having parameters influencing the evanescent wave coupling between the first waveguide (12) and the second waveguide (14), said parameters being chosen such that the coupling (C) is greater than 15%.

Abstract: A machine and method for laser working of profiles and in particular for carrying out an inclined cutting operation on profiles are provided. Before working operation, a support and guide device are positioned in a given starting position along the longitudinal axis of the profile with respect to a working head. During working operation, the support and guide device are moved along the longitudinal axis integrally with a feeding device, that is with the profile, so as to keep constant the extent of the projection of the profile from the support and guide device. Integral movement of the support and guide device with the feeding device is limited to the portion of the movement of the feeding device which is required to compensate for tilting movements of the working head about an axis of oscillation.

Abstract: Modular photoacoustic detection device comprising: a photoacoustic cell including at least two chambers connected by at least two capillaries and forming a Helmholtz type differential acoustic resonator; acoustic detectors coupled to the chambers; a light source capable of emitting a light beam having at least one wavelength capable of exciting a gas intended to be detected and which can be modulated to a resonance frequency of the photoacoustic cell; a first photonic circuit optically coupling the light source to an input face of a first of the chambers; wherein the first photonic circuit is arranged in a detachable manner in a first housing formed in the acoustic cell and emerging on the input face of the first chamber.

Abstract: The invention relates to an electronic component for producing infrared radiation. Said component includes a first element and a second element arranged so as to form a closed vacuum cavity in which at least one resistive element of said electronic component is suspended, the at least one resistive element including metal. Said first and second elements are connected by eutectic solder so as to sealingly close the cavity. Said electronic component comprises connection terminals located outside the closed cavity and connected electrically to the suspended resistive element.

Abstract: The present invention relates to a particle detector comprising at least an optical device configured to emit a luminous radiation; and a substrate extending in a plane and defining a channel intended to receive particles, the channel extending principally in a direction perpendicular to the principal plane; characterised in that the detector comprises a matrix of photo detectors and a reflecting surface; the matrix of photo detectors and the reflecting surface being disposed on mutually parallel planes and situated on either side of said portion of the substrate so that a part of the luminous radiation passes through the channel by being diffracted by a particle, then reflects off the reflecting surface, and then reaches the matrix of photo detectors.

Abstract: Modular photoacoustic detection device comprising: a photoacoustic cell including at least two chambers connected by at least two capillaries and forming a Helmholtz type differential acoustic resonator; acoustic detectors coupled to the chambers; a light source capable of emitting a light beam having at least one wavelength capable of exciting a gas intended to be detected and which can be modulated to a resonance frequency of the photoacoustic cell; a first photonic circuit optically coupling the light source to an input face of a first of the chambers; wherein the first photonic circuit is arranged in a detachable manner in a first housing formed in the acoustic cell and emerging on the input face of the first chamber.

Abstract: Modular photoacoustic detection device comprising: a photoacoustic cell including at least two chambers connected by at least two capillaries and forming a Helmholtz type differential acoustic resonator; acoustic detectors coupled to the chambers; a light source capable of emitting a light beam having at least one wavelength capable of exciting a gas intended to be detected and which can be modulated to a resonance frequency of the photoacoustic cell; a first photonic circuit optically coupling the light source to an input face of a first of the chambers; wherein the first photonic circuit is arranged in a detachable manner in a first housing formed in the acoustic cell and emerging on the input face of the first chamber.

Abstract: The invention relates to an electronic component for producing infrared radiation. Said component includes a first element and a second element arranged so as to form a closed vacuum cavity in which at least one resistive element of said electronic component is suspended, the at least one resistive element including metal. Said first and second elements are connected by eutectic solder so as to sealingly close the cavity. Said electronic component comprises connection terminals located outside the closed cavity and connected electrically to the suspended resistive element.

Abstract: A machine and a method for the laser working of profiles (P) are described, in particular for carrying out an inclined cutting operation on the profile (P), for example for making a flared hole (H), wherein before the working operation a support and guide device (12) is positioned in a given starting position along the longitudinal axis (x) of the profile (P) with respect to a working head (10), and then, during the working operation the support and guide device (12) is moved along the longitudinal axis (x) integrally with a feeding device (14), i.e. integrally with the profile (P), so as to keep constant, during the working operation, the extent of the projection (A) of the profile (P) from the support and guide device (12), said integral movement of the support and guide device (12) with the feeding device (14) being limited to that portion of the movement of the feeding device (14) which is required to compensate for tilting movements of the working head (10) about said axis of oscillation (t).

Abstract: The invention relates to an optical coupler (10) in a vertical configuration, comprising a first waveguide (12) and a second waveguide (14). The optical coupler (10) comprises a third waveguide (16) distinct from the first and second waveguides (12, 14) and extending parallel to the first and second waveguides (12, 14), the third waveguide (16) being arranged between the first waveguide (12) and the second waveguide (14) in a transverse direction (X) perpendicular to the longitudinal direction (Z) and having parameters influencing the evanescent wave coupling between the first waveguide (12) and the second waveguide (14), those parameters being chosen such that the coupling (C) is greater than 15%.

Abstract: A photoacoustic detection device including a nanophotonic circuit including a first chip on which is formed at least one optical waveguide and in which is formed a set of cavities defining a Helmholtz resonator; at least one optical source capable of emitting an optical signal in a given wavelength range, capable of being modulated at an acoustic modulation frequency, this source being attached to the first chip; a second chip forming a cap for said cavities and including acoustic sensors; and electronic circuits for processing the output of the acoustic sensors formed in the first or the second chip.

Abstract: The invention relates to a particle detector including a substrate made of a semiconductor material, in which at least one through-cavity is formed, defined by an input section and an output section, wherein the input section thereof is to be connected to an airflow source, the substrate supporting: an optical means including at least one laser source, and at least one waveguide connected to the at least one laser source and leading into the vicinity of the output section of the cavity; and a photodetector located near the output section of the cavity and offset relative to the optical axis of the optical means.

Abstract: Modular photoacoustic detection device comprising: a photoacoustic cell including at least two chambers connected by at least two capillaries and forming a Helmholtz type differential acoustic resonator; acoustic detectors coupled to the chambers; a light source capable of emitting a light beam having at least one wavelength capable of exciting a gas intended to be detected and which can be modulated to a resonance frequency of the photoacoustic cell; a first photonic circuit optically coupling the light source to an input face of a first of the chambers; wherein the first photonic circuit is arranged in a detachable manner in a first housing formed in the acoustic cell and emerging on the input face of the first chamber.

Abstract: The invention relates to an optical coupler (10) in a vertical configuration, comprising a first waveguide (12) and a second waveguide (14). The optical coupler (10) comprises a third waveguide (16) distinct from the first and second waveguides (12, 14) and extending parallel to the first and second waveguides (12, 14), the third waveguide (16) being arranged between the first waveguide (12) and the second waveguide (14) in a transverse direction (X) perpendicular to the longitudinal direction (Z) and having parameters influencing the evanescent wave coupling between the first waveguide (12) and the second waveguide (14), those parameters being chosen such that the coupling (C) is greater than 15%.

Abstract: A device for non-linear conversion of first infrared signal into a second infrared signal with a wavelength that is less than that of the first infrared signal by means of four-wave mixing, which includes at least one portion of SiGe arranged on at least one first layer of material with a refractive index which is less than that of silicon, a germanium concentration in the portion of SiGe which varies continuously between a first value and a second value which is greater than the first value, in a direction which is approximately perpendicular to a face of the first layer on which the portion of SiGe is arranged, and in which a summital part of the portion of SiGe where the germanium concentration is equal to the second value is in contact with a gas and/or a material with a refractive index which is less than that of the silicon.

Abstract: The invention relates to an optical coupler (10) in a vertical configuration, capable of working for a wavelength and comprising a first waveguide (12) and a second waveguide (14). The second waveguide (14) has a patterning (33) in the form of a series of patterns (36), the patterns (36) extending along a transverse direction (X) perpendicular to the longitudinal direction (Z), being parallel to each other and orthogonal to the general direction of the first waveguide (12), each pattern (36) being arranged both in the core (30) and the cladding (32) of the second waveguide (14) and having parameters influencing the evanescent wave coupling between the first waveguide (12) and the second waveguide (14), said parameters being chosen such that the coupling (C) is greater than 15%.

Abstract: Microelectronic photoacoustic detection device comprising: a substrate comprising cavities forming a Helmholtz differential acoustic resonator; acoustic detectors coupled to the chambers of the resonator; a light source; a waveguide comprising a first end coupled to the light source and a second end coupled to a first chamber; in which the second end comprises, at the interface with the first chamber, a width greater than that of the first end and that of the given wavelength, and/or in which the device comprises a diffraction grating arranged in the second end and capable of diffracting a first part of the beam towards a lower reflective layer arranged under the second end and a second part of the beam towards an upper reflective layer arranged at an upper wall of the first chamber.

Abstract: Microelectronic photoacoustic detection device comprising: a substrate comprising cavities forming a Helmholtz differential acoustic resonator; acoustic detectors coupled to the chambers of the resonator; a light source; a waveguide comprising a first end coupled to the light source and a second end coupled to a first chamber; in which the second end comprises, at the interface with the first chamber, a width greater than that of the first end and that of the given wavelength, and/or in which the device comprises a diffraction grating arranged in the second end and capable of diffracting a first part of the beam towards a lower reflective layer arranged under the second end and a second part of the beam towards an upper reflective layer arranged at an upper wall of the first chamber.

Abstract: A gas detector including a planar mirror; a concave spherical mirror facing the planar mirror, having an optical axis orthogonal to the planar mirror, the distance between the planar and spherical being equal to 0.75 times the radius of curvature of the spherical mirror, to within 10%; a radiation emitter/receiver arranged at the point of intersection of the spherical mirror and of the optical axis; and a radiation receiver/emitter arranged at the point of intersection of the planar mirror and of the optical axis.