Abstract: A system for compensating for the distortion of a wavefront of one portion at least of an incident light beam comprises: —an adaptive optic for providing, via reflection from an active surface, a corrected light beam; —a mode splitter for providing a plurality of output light beams belonging to a family of target modes; —a photonic device that is optically coupled to the mode splitter, the photonic device being configured to deliver: i. a useful light beam; ii. quantities representative of the characteristics of the output light beams; —a controller of the adaptive optic, the controller being connected to the photonic device and to the adaptive optic, the controller being configured to, on the basis of the quantities, adjust the deformation of the active surface.

Abstract: A multi-passage cavity made up of the assembly of a planar mounting and first and second reflective optical elements each having a main face arranged opposite one another, the main face of at least one of the optical elements being microstructured to modify the phase of incident luminous radiation that is reflected several times on each of the optical elements to form transformed radiation, the multi-passage cavity includes precisely three assembly interfaces.

Abstract: Device (1) for processing light radiation, comprising: —an optical input (2) for receiving an input beam from an optical source (3) and for propagating in the device (1) an input radiation, an optical output (4) for emitting an output beam having predetermined spatial parameters, an MPLC conversion device (5) which is arranged between the optical input (2) and the optical output (4) and which is configured to spatially separate, in a separation plane (7), the input radiation into useful radiation, in a target mode, which is propagated to the optical output (4) and into an interference radiation. The processing device also comprises at least one device (8) for blocking the interference radiation, which blocking device is arranged in the separation plane (7) so that it does not contribute to the output beam.

Abstract: A device for manipulating a light radiation by reflecting the light radiation multiple times on at least two reflecting surfaces of a monolithic block made of homogenous transparent material comprises a first and second zone on surfaces of the block for injecting the light radiation to be manipulated, and for extracting the light radiation after manipulation. At least one of the reflective surfaces is micro-structured to impart a determined spatial phase transformation.

Abstract: A device for alternating between different shapes of a light beam includes a multi-plane light conversion (MPLC) device that is used to apply a unitary transformation to a light beam by way of a succession of elementary transformations. The MPLC faces the light source so that the light beam is emitted into the MPLC device along a reference axis. The device further includes automated means arranged upstream of the multi-plane light conversion (MPLC) device for varying the transverse position and/or the angle of incidence of the light beam in relation to the reference axis and/or to vary the angle of rotation of the light beam about the reference axis. The MPLC device is designed to transform a variation of the transverse position and/or the angle of incidence and/or the angle of rotation of the light beam into a modification of the specific shape of the light beam.

Abstract: An optical device for forming an output light beam having at least one target mode, by combining a plurality of phase-locked input light beams collectively forming incident light radiation, comprises a conversion device, arranged between the input plane and the output plane, configured to carry out a modal conversion aimed at conveying the energy portion of incident radiation present in a main supermode to the target mode, and aimed at conveying the energy portion of the incident radiation present in interference supermodes to deformation modes. A system for producing an output light beam comprises such an optical device.

Abstract: An optical device is formed of a plurality of optical parts arranged on a carrier, at least one optical element of which has a main face provided with a first microstructured zone for intercepting incident luminous radiation propagating along a first determined optical path, the first microstructured zone spatially modifying the phase of the incident luminous radiation according to a determined spatial profile. The first microstructured zone is used to form, via a plurality of reflections or transmissions off/through the one or more optical elements, transformed luminous radiation. The optical device comprises an input stage for guiding the injection of positioning luminous radiation, along a second optical path, and the main surface of the optical element includes a second microstructured zone that is configured to reflect the positioning luminous radiation and to back-propagate the positioning radiation along the second optical path.

Abstract: A method for fixing a single-mode fiber to a multimode fiber comprises the following steps: injecting light radiation into the injection end of the single-mode fiber and positioning the junction ends of the single-mode fiber and of the multimode fiber relative to one another so as to propagate at least part of the light radiation in the multimode fiber; modally decomposing the light radiation collected at the injection end of the multimode fiber and measuring a quantity representative of the optical power present in a first group of secondary modes; and adjusting the relative position of the junction ends and freezing them with respect to one another in a determined relative coupling position. Coupling equipment for carrying out the fixing method is also disclosed.

Abstract: A method for fixing a single-mode fiber to a multimode fiber comprises the following steps: injecting light radiation into the injection end of the single-mode fiber and positioning the junction ends of the single-mode fiber and of the multimode fiber relative to one another so as to propagate at least part of the light radiation in the multimode fiber; modally decomposing the light radiation collected at the injection end of the multimode fiber and measuring a quantity representative of the optical power present in a first group of secondary modes; and adjusting the relative position of the junction ends and freezing them with respect to one another in a determined relative coupling position. Coupling equipment for carrying out the fixing method is also disclosed.

Abstract: A method for fixing a single-mode fiber to a multimode fiber comprises the following steps: injecting light radiation into the injection end of the single-mode fiber and positioning the junction ends of the single-mode fiber and of the multimode fiber relative to one another so as to propagate at least part of the light radiation in the multimode fiber; modally decomposing the light radiation collected at the injection end of the multimode fiber and measuring a quantity representative of the optical power present in a first group of secondary modes; and adjusting the relative position of the junction ends and freezing them with respect to one another in a determined relative coupling position. Coupling equipment for carrying out the fixing method is also disclosed.

Abstract: An optical device is formed of a plurality of optical parts arranged on a carrier, at least one optical element of which has a main face provided with a first microstructured zone for intercepting incident luminous radiation propagating along a first determined optical path, the first microstructured zone spatially modifying the phase of the incident luminous radiation according to a determined spatial profile. The first microstructured zone is used to form. via a plurality of reflections or transmissions off/through the one or more optical elements, transformed luminous radiation. The optical device comprises an input stage for guiding the injection of positioning luminous radiation, along a second optical path, and in that the main surface of the optical element includes a second microstructured zone that is configured to reflect the positioning luminous radiation and to back-propagate the positioning radiation along the second optical path.

Abstract: A device for manipulating a light radiation by reflecting the light radiation multiple times on at least two reflecting surfaces of a monolithic block made of homogenous transparent material comprises a first and second zone on surfaces of the block for injecting the light radiation to be manipulated, and for extracting the light radiation after manipulation. At least one of the reflective surfaces is micro-structured to impart a determined spatial phase transformation.

Abstract: A device is provided for processing a light/optical radiation including at least two reflective optical elements defining a multi-pass cavity so that at least one of the optical elements reflects the light radiation at least twice, at at least two different reflection positions, and including at least one element, called a corrective element, having at least one position, called a corrective position, producing a reflection or a transmission of the optical radiation, and the surface of which is irregular so that the spatial phase profile of the corrective position has a different phase shift for several different reflection/transmission points of the corrective position.

Abstract: A device for alternating between different shapes of a light beam includes a multi-plane light conversion (MPLC) device that is used to apply a unitary transformation to a light beam by way of a succession of elementary transformations. The MPLC faces the light source so that the light beam is emitted into the MPLC device along a reference axis. The device further includes automated means arranged upstream of the multi-plane light conversion (MPLC) device for varying the transverse position and/or the angle of incidence of the light beam in relation to the reference axis and/or to vary the angle of rotation of the light beam about the reference axis. The MPLC device is designed to transform a variation of the transverse position and/or the angle of incidence and/or the angle of rotation of the light beam into a modification of the specific shape of the light beam.

Abstract: A device is provided for processing a light/optical radiation including at least two reflective optical elements defining a multi-pass cavity so that at least one of the optical elements reflects the light radiation at least twice, at at least two different reflection positions, and including at least one element, called a corrective element, having at least one position, called a corrective position, producing a reflection or a transmission of the optical radiation, and the surface of which is irregular so that the spatial phase profile of the corrective position has a different phase shift for several different reflection/transmission points of the corrective position.

Abstract: A device is provided for processing a light/optical radiation including at least two reflective optical elements defining a multi-pass cavity so that at least one of the optical elements reflects the light radiation at least twice, at at least two different reflection positions, and including at least one element, called a corrective element, having at least one position, called a corrective position, producing a reflection or a transmission of the optical radiation, and the surface of which is irregular so that the spatial phase profile of the corrective position has a different phase shift for several different reflection/transmission points of the corrective position.

Abstract: A device is provided for processing a light radiation, including at least two reflective optical elements defining a multi-pass cavity so that at least one of the optical elements reflects the light radiation at least twice, at at least two different reflection positions, and including at least one element, called corrective element, having at least one position, called corrective position, producing a reflection or a transmission of the optical radiation, and the surface of which is irregular so that the spatial phase profile of the corrective position has a different phase shift for several different reflection/transmission points of corrective position.