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AssigneesCompagnie Industrielle des Laser CILAS, Astrium GmbH
InventorsDavid Sabourdy, Jean-Eucher Montagne, Alain Barthelemy, Agnes Desfarges-Berthelemot, Vincent Kermene, Sandrine Auroux, Julien Guillot, Brigitte Serreault, Bruno Esmiller
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The invention relates to a laser cavity with central extraction by polarisation for coherent coupling of intense intra-cavity beams. The laser cavity (1) according to the invention comprises an extraction unit (7) with central extraction, which divides the laser cavity (1) longitudinally into two functional portions (P1, P2), namely a first portion (P1) including the active components (3), which amplifies the laser beams (4), and a second portion (P2) which performs coherent coupling of the laser beams (4).
A laser cavity, which makes it possible to produce at least one laser ray (6) and which comprises:
Dependencies are inferred from the claim text.
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Construction or shape of active medium: consisting of a plurality of parts, e.g. segments
Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range: construction or…
Construction or shape of optical resonators or components thereof: passive cavity elements acting on the polarization, e.g. a polarizer for…
Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium: construction or shape of optical…
About 4 years 6 months of term left · ends 4 May 2031 (estimated)
This application is a §371 national stage entry of International Application No. PCT/FR2011/051009, filed May 4, 2011, which claims priority to French Patent Application No. 1001963 filed May 7, 2010, the entire contents of which are incorporated herein by reference.
The present invention relates to a modular laser cavity for passive coherent coupling of high-intensity laser beams by means of central extraction by polarisation. It further relates to a laser source comprising a laser cavity of this type.
It is known that the purpose of a laser cavity is to produce and extract a laser ray, and that for this purpose it comprises in particular: two mirrors which oppose one another so as to define said laser cavity; and at least one active element (or laser amplifier), which is arranged between these two mirrors and which can absorb a pump beam so as to amplify a laser beam propagating along a propagation axis.
The figures of the appended drawings will provide a good understanding of how the invention may be carried out. In the drawings, like reference numerals denote similar elements.
FIGS. 1 to 5 show schematically particular embodiments of laser cavities according to the invention.
The laser cavity 1 (or optical cavity) according to the invention, which is shown schematically in different embodiments in FIGS. 1 to 5, is for use in a laser source.
In addition to said laser cavity 1, a laser source of this type (not shown) comprises, in the conventional manner, in particular: a conventional pump system, which comprises means which can emit at least one pump beam; and a conventional optical transport system, which is intended to direct the pump beam emitted by the pump system into said laser cavity 1, so as to pump active elements 3 which are detailed below.
Said laser cavity 1 comprises, in the conventional manner: two opposing mirrors 2A and 2B which define this laser cavity 1; and a plurality of active elements 3. An active element 3 is an amplification element. Each amplification element comprises a doped material which can absorb the pump beam (not shown) emitted by the pump system so as to amplify a corresponding laser beam 4 which propagates along a propagation axis 5.