Commissariat a L'energie Atomique

Teem Photonics, Inc.

Commissariat a L'eneriqie Atomigue

Engin Molva

Philippe Thony

Bernard Ferrand

Laurent Fulbert

Pascal Besesty

Jean-Jacques Aubert

Marc Rabarot

Corinne Borel

Roger Accomo

Serge Gidon

Eric Ollier

Guy Feuillet

Jean Marty

Philippe Nerin

Guy Labrunie

Jean-Louis Pautrat

Jean-Michel Nunzi

Olivier Jacquin

Denis Barbier

Germain Chartier

Claire Bodin-Deshayes

Dang Le Si

Joel Cibert

Emanuel Hadji

Guy LaBrunie

Muriele Bergeon

A device for measuring the concentration of a gas contained in a cavity and for checking the operation of a catalytic element in an exhaust line in an automobile vehicle. A first emitter (E) composed of an optical pumped micro-cavity and for which the emission spectrum is within the gas absorption band emits a first radiation that passes through the cavity. A second emitter emits a second radiation that passes through the cavity. A receptor measures the optical intensity (I) of the radiation that passed through the cavity.

Device for measuring gas concentration having dual emitter

An optical pump device including a pump source optically connected to an optical divider including one input channel and n output channels. The input channel is configured to receive a pump wave derived from the source and the n output channels are configured to output n pump waves, where n is an integer greater than 1. The pump device can be used in an optical amplification device. The device has applications in all domains in which several optical pumps are necessary, and more particularly in the domain of optical telecommunications, and for example for optical amplifiers.

Optical pump device with several output channels and use of same in an amplifier device

Implementation of ultrahigh frequency emitters and applications to radar and telecommunications

Solid microlaser passively switched by a saturable absorber and its production process

Velocity measurement device and laser range finder using a coherent

The invention relates to a microlaser cavity (10) having:

Solid microlaser passively switched by a saturable absorber and its

The invention relates to an active laser material having a base material doped with active ions, giving said base material laser properties, the ion concentration being equal to or higher than 2%. The invention also relates to a microlaser produced with such a material, as well as a process for producing such a material. The microlaser incorporates an active medium (6) produced by epitaxial growth on a substrate (8), the latter then being removable, as well as microlaser cavity mirrors (2, 4). A pumping beam (10) makes it possible to optically pump the cavity.

Laser materials and microlasers having high active ion concentrations,

A microlaser having input and output mirrors defining a microlaser cavity, a solid active dielectric medium disposed in the microlaser cavity, and a pumping mechanism which pumps the microlaser and which includes at least one vertical cavity semiconductor laser. The microlaser may also include a microoptical focusing device, passive and/or active cavity switches. A plurality of such microlasers can be assembled to form a bidimensional network.

Solid microlaser with optical pumping by vertical cavity semiconductor

The invention relates to a device for an infrared light emitter comprising a semiconductor element (12) able to emit infrared radiation and a switched microlaser (2, 4, 6, 8) arranged so as to be able to optically pump the semiconductor element.

Monolithic semiconductor infrared emitter pumped by a switched solid

The invention relates to a microlaser cavity switched with the aid of an electrooptical material (54). Electrodes (84, 86) are produced on support elements (80, 82) and the latter are then applied on either side of the electrooptical element. Solid electrodes can also be applied on either side of the electrooptical material.

Electrooptically switched solid microlaser with independent electrodes

The invention relates to a remote gas detection process comprising: the emission of a first radiation (4), at at least one absorption wavelength for the gas to be detected, with the aid of a first switched microlaser, in the direction of a test area (6), the production of a first signal (S), representative of the radiation quantity scattered by said gas in response to the interaction between the molecules or atoms of said gas and said first radiation. The invention also relates to an apparatus for performing this process.

Remote gas detection apparatus having a microlaser

Active-switching laser and microchip laser

A microlaser cavity to a microlaser incorporating an active solid medium (38) and means (44) for switching the cavity, whilst also having, within said cavity, at least one element (46) of an optically nonlinear material, making it possible to multiply the basic frequency of the laser cavity by a factor n (n.gtoreq.2).

Switched monolithic microlaser and intracavity nonlinear material

The invention relates to an optical parametric oscillator characterized in that it comprises an OPO nonlinear material (18) and two mirrors (24, 26) on either side of said nonlinear material and forming an OPO cavity and a switched microlaser (2, 6, 8, 26) for generating an OPO cavity laser pumping beam.

Microlaser-pumped monolithic optical parametric oscillator

A microoptical component including a microlens having a focal axis and a microbeam to which said microlens, is integrally fixed said microbeam extending along an axis substantially perpendicular to the focal axis of the microlens and undergoing elastic deformations along an axis substantially perpendicular to the focal axis of the microlens and to the axis along which the microbeam extends.

Microoptical components and optomechanical microdeflectors with

Growing community of inventors

Grenoble, France

Engin Molva