Compagnie Industrielle Des Lasers Cilas

Centre National De La Recherche Scientifique

Airbus Defence and Space Sas

Astrium Sas

Université De Limoges

Compagnie Industrielle Des Laser Cilas

Arianegroup Sas

Airbus Safran Launchers Sas

Jean-Eucher Montagne

David Sabourdy

Alain Barthelemy

Bruno Esmiller

Vincent Kermene

Agnès Desfarges-Berthelemot

Sandrine Auroux

Julien Guillot

Brigitte Serreault

Paul Armand

Joël Benoist

Marc Le Neve

Louis Cabaret

David Kabeya

Luc Nguyen

Luc Nguyen Duy

Agnès Desfarges-Berthellemot

Alexandre Martins-Santana

Alexandra Rapaport

Benjamin Forestier

An active element slab for a laser source is presented. The active element slab includes at least one input surface of a pump beam, a first section in the shape of an elongated bar along a longitudinal axis that includes a first doped matrix configured to absorb the beam pump to amplify a laser beam travelling longitudinally, a second section that covers at least partially the first section, the second section that includes a second doped matrix configured to absorb the laser beam and of being transparent to the pump beam.

Active element slab for a laser source

According to the invention, a plurality of elementary laser beams (f) are generated, the phases of which are adjusted by an electro-optical feedback loop () implementing the matrix equation of a phase-contrast filtering device ().

Method and system for generating a high laser power

The invention concerns a laser amplification system comprising a pumping device and at least one thick amplifier disc having a first face, which is reflective at the wavelengths of a pulsed laser beam of the laser amplification system and of a pump beam of the pumping device, as well as at least one heat-dissipation component to which this first face of the amplifier disc is firmly secured, the saturation fluence of the active medium of the amplifier disc being equal to or less than 3 J&#xb7;cm.

Thick disc laser amplification system and uses thereof

The laser cavity is of the unstable type and is provided with a passive Q-switch, the passive Q-switch comprising a saturable absorber that has an absorption gradient, so that the absorption profile of the saturable absorber is inhomogeneous over the cross section of the beam travelling in the laser cavity.

Unstable laser cavity with passive Q-switch fitted with a saturable absorber with absorption gradient

Method and laser oscillator for the generation of a laser beam&#x2014;According to the invention with a view to adjusting, inside said laser oscillator (), the phase of each of the N elementary laser beams (FLE., FLE., FLE.N) generated on the basis of said laser oscillator () in such a way that said elementary laser beams are in phase, the deviation between the phase of an individual elementary laser beam (FLE.) and the phases of the N&#x2212;1 other elementary laser beams (FLE., FLE.N) is converted into a level of luminous intensity by means of at least one optical filtering element to which at least a part of each elementary laser beam is directed.

Method and laser oscillator for the generation of a laser beam

The invention relates to a laser cavity with central extraction by polarisation for coherent coupling of intense intra-cavity beams. The laser cavity () according to the invention comprises an extraction unit () with central extraction, which divides the laser cavity () longitudinally into two functional portions (P, P), namely a first portion (P) including the active components (), which amplifies the laser beams (), and a second portion (P) which performs coherent coupling of the laser beams ().

Laser cavity with central extraction by polarisation for coherent coupling of intense intra-cavity beams

An active element for a laser source, the active element comprising an elongated bar with a reflective lateral surface, doped to be able to absorb at least a pumping beam being propagated at least approximately longitudinally in the bar in order to amplify at least a laser radiation also being propagated longitudinally; and a jacket in contact with the lateral surface of the bar and presenting a refractive index smaller than that of the bar, in the reflective lateral surface of the bar, there is at least one dull-ground diffusing zone able to interrupt the paths of spurious laser modes being propagated in the bar by total internal reflections on the lateral surface.

Active element for laser source and laser source including such an active element

A pumping system for a laser source includes a pump diode that emits a pump beam having a central wavelength that varies with temperature. A selective mirror having a plurality of spectral reflectivity peaks, corresponding to a plurality of predetermined wavelengths, locks the operation of the pump diode onto one of the predetermined wavelengths in accordance with temperature.

Pumping system for a laser source and laser source comprising such a pumping system

Active element for a laser source and laser source comprising such an active element

A laser source ( ) includes a pumping system ( ) and an active element ( ) which comprises a doped elongate rod ( ) and at least one optical block ( ) for guiding the pump rays (F) of at least one pump beam toward the rod ( ). The pumping system ( ) generates a number of parallel pump rays (F). The entry face ( A, A) of the optical block ( ) is inclined to the longitudinal axis (X&mdash;X) of the rod ( ) and is not orthogonal to the pump rays (F) in order to deflect the pump rays (F) by refraction so as to transmit them toward the rod ( ), and the inclination of the entry face ( A, A) is such that the pump rays (F) reach the bar ( ) so as to be distributed over its entire length.

Laser source

According to this method, in order to fabricate active elements which comprise at least one doped part comprising a doping capable of absorbing a pump beam and at least one undoped part, and which have opposed faces of the same geometrical shape, a process of preparing an elongate active rod ( ), which has a cross section identical to said geometrical shape, said process comprising at least one step of cutting and one step of joining at least one doped block ( ) and at least one undoped block ( ), and a process of forming a plurality of active elements from the active rod ( ), said formation process comprising at least one step of transverse cutting along the active rod ( ) and the step of collectively treating surfaces of the active elements, are carried out in succession.

Growing community of inventors

Orleans, France

Jean-Eucher Montagne