Commissariat a L'energie Atomique

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Compagnie Generale Des Matieres Nucleaires

Laurent Couston

Fabrice Canto

Jacques Delage

Alastair Magnaldo

Jean-Emmanuel Broquin

Elsa Jardinier

Davide Bucci

Danièle Roudil

Mathieu Brutel

An optical waveguide including a first substrate incorporating a first optical guiding structure exposed at a surface of the first substrate, a second substrate incorporating a second optical guiding structure exposed at a surface of the second substrate, the two substrates being assembled superimposed by their surfaces such that the two optical guiding structures are facing each other and extend in a same direction. A channel is fitted between the first and the second guiding structure, directed along the direction, the channel having a cross-section with a large dimension substantially parallel to the surface of the first substrate and to the surface of the second substrate, enabling light to interact on a given distance with the fluid. Such a waveguide can, for example, find application to fluid analysis.

Optical waveguide comprising a nano-channel and optofluidic sensor using such an optical waveguide

A method for measuring focal distance of a thermal lens located in an analyte, the method including: providing an exciting optical beam passing through the analyte and creating the thermal lens therein; emitting a coherent probe optical beam passing through the analyte and being propagated substantially perpendicular to the exciting optical beam; intercepting the probe optical beam by a detector after passing through the analyte; focusing the probe optical beam upstream or downstream of the thermal lens such that only a fraction of the probe optical beam passes through the thermal lens; acquiring an interference image by the detector; and processing the interference image to calculate the focal distance of the thermal lens. Such a method may find application in physico-chemical analysis of the analyte.

Device for measuring the focal distance of a thermal lens

A device for measuring the intensity of a luminescence radiation emitted by at least one chemical species probed, along a trajectory by an excitation radiation. The device includes n measurement channels, where n is an integer greater than or equal to 2, each measurement channel being used to measure a fraction of the intensity of the luminescence radiation emitted along the trajectory. The device is also applicable to analytical chemistry to make speciation measurements.

Luminescence measuring device with pre-filter effect suppression

A piezoelectric sensor () is dedicated to making a precise measurement of the light amplitude of pulses () from a laser (), so that quantitative measurements such as photo-acoustic spectroscopy can be used to precisely measure the concentration of some bodies in a solution.

Device for inline measurement laser pulses and measuring method by photoacoustic spectroscopy

A sensor including an emission-reception device 22 which emits a light interacting with a fluid 24 and receives the light after it interacts with the fluid. A tubular light guide 26 immersed in fluid has one end facing the emission-reception device and another end for reflection. A structure 32 maintains the tubular light guide at a predetermined distance from the emission-reception device in order to form an evanescent wave in the fluid.

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Les Angles, France

Laurent Couston