Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Thales

Université De Reims Champagne-ardenne

Centre National De La Recherche Scientifique

Alcatel Lucent

Mickaël Brun

Sergio Nicoletti

Salim Boutami

Pierre Labeye

Alain Gliere

Justin Rouxel

Serge Gidon

Hubert Moriceau

Jean-Marc Fedeli

Jean-Michel Hartmann

Philippe Andreucci

Maryse Fournier

Ludovic Poupinet

Salim Mimouni

Mathieu Carras

Pierre Barritault

Bertrand Parvitte

Xavier Marcadet

Virginie Zeninari

Adonis Bogris

Alexandros Kapsalis

Dimitris Syvridis

Grégory Maisons

Julien Favreau

A method for producing a waveguide including a germanium-based core and a cladding is provided, the method including a step of 'low temperature' depositing of a shell after forming the core by engraving, such that the deposition temperature is less than 780&#xb0; C., followed by a step of 'high temperature' depositing of a thick encapsulation layer. The shell and the encapsulation layer at least partially form the cladding of the waveguide. Optionally, a step of annealing under hydrogen at a &#x201c;low temperature&#x201d;, less than 750&#xb0; C., precedes the deposition of the shell. These &#x201c;low temperature&#x201d; annealing and depositing steps advantageously make it possible to avoid a post-engraving alteration of the free surfaces of the core during the forming of the cladding which is less germanium-rich.

Method for producing Ge-core based waveguides

The invention relates to an optical coupler () in a vertical configuration, capable of working for a wavelength and comprising a first waveguide () and a second waveguide (). The second waveguide () has a patterning () in the form of a series of patterns (), the patterns () 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 (), each pattern () being arranged both in the core () and the cladding () of the second waveguide () and having parameters influencing the evanescent wave coupling between the first waveguide () and the second waveguide (), said parameters being chosen such that the coupling (C) is greater than 15%.

Optical coupler provided with a structuration

Modular photoacoustic detection device comprising:

Modular photoacoustic detection device

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.

Electronic component with a metal resistor suspended in a closed cavity

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

Optical coupler provided with an intermediate waveguide

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.

Photoacoustic gas sensor with a helmholtz cell

An optical coupler integrated on a substrate, that will optically couple a laser and a waveguide and including an external element, including two arms separated by a notch, this notch being delimited laterally by two first walls at a spacing that reduces towards the bottom of the notch; a central element, located in the notch delimited laterally by two second walls and with a first region in which the two second walls are in direct contact with two first walls as far as the bottom of the notch; and an intermediate element, extending between the external element and the central element. The optical index of the central element is greater than the optical index of the intermediate element, itself greater than the optical index of the arms of the external element. Such an optical coupler provides efficient coupling between a laser emitting in the mid-infrared and a waveguide integrated on a substrate.

Optical coupler integrated on a substrate and comprising three elements

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.

Device for non-linear signal conversion by four-wave mixing

Microelectronic photoacoustic detection device comprising:

Helmholtz type differential acoustic resonator detection device

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.

Optical gas detector

A gas detector including: an assembly of two coaxial parabolic reflective caps having opposite concavities, and a wafer arranged in the focal plane of the two caps, at the center of this focal plane, comprising, back-to-back: a diverging light emitter directed towards the first cap and a light receiver directed towards the second cap, wherein the two caps are distant substantially by the sum of their focal distances plus the thickness of the wafer.

A photoacoustic detection device including a nanophotonic circuit including a plurality of semiconductor lasers capable of emitting a different frequencies; input couplers connected to optical waveguides; a multiplexer; an output optical waveguide, emerging into a recess; a tuning fork having its free arms arranged at the output of the output optical waveguide; and means for detecting the vibration of the tuning fork, all these elements being assembled in a monolithic component.

Photoacoustic gas detector

The invention generally pertains to the field of solid immersion lenses for optical applications in high resolution microscopy. The lens of the invention includes a spherical sector limited by a planar surface and an object having nanometric dimensions arranged on the planar surface at the focus of said solid immersion lens. A light-opaque layer having a central opening with nanometric dimensions can be provided on the planar surface, said opening being centred on the focus of the solid immersion lens. The nano-object can be a tube or a thread having a cylindrical shape. The lens of the invention can be made using lithography techniques.

Growing community of inventors

Eybens, France

Mickaël Brun