Centre National De La Recherche Scientifique

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Ecole Centrale De Lyon

Universite Claude Bernard – Lyon1

Institut National Des Sciences Appliquees De Lyon

Cpe Lyon Formation Continue Et Recherche

Christian Seassal

Jean-Louis Leclercq

Pierre Viktorovitch

Xavier Letartre

Salim Boutami

Jean-Marc Fedeli

Maryse Fournier

Gabriel Jobert

Michel Garrigues

Pedro Rojo-Romeo

Cécile Jamois

Fabien Mandorlo

Alain Spisser

An optical particle detector including at least one channel intended to receive a fluid carrying at least one particle, and across which light rays are intended to pass such that the light rays are partially scattered by the at least one particle, a plurality of photodetectors capable of receiving said scattered light rays, wherein the detector includes at least one optical waveguide configured to collect, at least at one entrance of the waveguide, light rays that were not scattered by the at least one particle and having crossed the channel, and to reinject the unscattered light rays into the channel through at least one exit of the waveguide.

Optical particle detector and method of manufacturing the same

The present invention relates to a device for controlling optical frequency (F, F) about a central working frequency (F). This device comprises a vertical cavity () formed of two parallel and partially reflecting walls (,), and a membrane () comprising at least one layer (,) structured in the form of a photonic crystal. In this device, the two walls (,) are separated by an optical distance substantially proportional to half the wavelength (&#x3bb;) corresponding to the central working frequency (F). The membrane () is integrated between the walls (,) of the cavity () and devised in such a way as to exhibit a mode of optical resonance at this central working wavelength (&#x3bb;). At least one layer of the device is made up of at least one portion of a material exhibiting nonlinear optical properties. The present invention also relates to various systems implementing means of optical pumping and such a device for controlling optical frequency, as well as to a method of manufacturing such a device for controlling optical frequency.

Device for controlling optical frequency, method of manufacturing such a device

A device for collecting light emitted by a laser source, including an optical wave guide arranged so as to collect a light signal emitted by the laser source, by coupling. The wave guide includes a loop coupled to a laser source in two coupling zones making it possible to recover optical modes circulating along the direction opposite to the required direction for the signal output from the device.

Device with wavelength selective coupler for collecting light emitted by a laser source

The invention concerns an optoelectronic device comprising at alteration of at least three semiconductor layers with selected shape, and two air layers. The semiconductor layers having N-type or P-type doping which may differ or not from one layer to the next layer, are separated by spacers whereof the doping is non-intentional (I-type) or intentional (N-type or P-type) to define a PINIP or NIPIN structure with air cavities, and are adapted to be set at selected respective electric potentials. The respective thicknesses and compositions of the layers and the spacers are selected so that the structure has at least an optical transfer function adapted to light to be treated and adjustable in accordance with the selected potentials applied to the semiconductor layers.

Semiconductor optoelectronic device with electrically adjustable transfer function

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Lyons, France

Christian Seassal