Thomson-csf

Laserdot

Societe Anonyme Dite : Laserdot

Thibaut De Saxce

Genevieve Girard

Louis Cabaret

Pierre Pinson

Jean-Paul Pocholle

Daniel Kaplan

Patrice Jano

Jean-Pierre Brasile

Franck Lacassie

A photoconductor-based electrical switch comprises an element made of photoconductor material possessing two electrodes located. on either side of an active zone, at least one light source emitting at least one light beam illuminating the active zone, the beam having a wavelength corresponding to a level of photon energy lower than the bandgap energy of the photoconductor material, the intensity of the light beam being such that there is a combination of the energy of at least two photons in the photoconductor material, in such a way that a mechanism of two-photon absorption in the photoconductor material contributes to the creation of carriers enabling the photoconductor material to be made conductive.

Photoconductor-based electrical switch

Optical device for measuring the roll angle of a projectile

Pumping laser diodes (3) are disposed around a reflector tube (2) having narrow windows (14) through which the emitting areas of the diodes look. The tube leaves an angular gap (16) around a rod to be pumped (1) and a cooling liquid flows in said gap. The invention is particularly applicable to optically pumping a YAG rod.

Rod laser with optical pumping from a source having a narrow emitting

An Nd/YAG slab laser (1) is pumped by laser diodes (2) placed at a distance from the laser slab. Reflectors (7) convey the light from the diodes to the slab. The distance is such that the density of such light is made uniform. A cooling fluid flows along a compartment (5) between the diodes and the slab. The invention is applicable to producing infrared coherent light.

Slab laser with optical pumping from a source having a narrow emitting

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Palaiseau, France

Thibaut De Saxce