Commissariat a L'energie Atomique

Commissariat a L'energie Atomique Center National De La Recherche

Christophe Wyon

Richard Moncorge

Bernard Ferrand

Denis Pelenc

Daniel Vivien

Anne-Marie Lejus

Maurice Couchaud

Claude Calvat

Bernard Francois

Isabelle Chartier

Andre Aubert

Laurent Colle

Monique Navizet

Christian Faure

Jean-Claude Rebreyend

Roselyne Romero

Jean Valignat

A laser cavity with passive switching by a saturable absorber and a laser incorporating the cavity. The laser cavity has a solid, active material saturable absorber, an entrance mirror and an exit mirror. The saturable absorber is a thin film of saturable absorber material directly deposited on the solid, active medium. The laser incorporates such cavity and a mechanism for pumping the cavity.

Laser cavity passively switched by a saturable absorber and laser

Mixed silicates of yttrium and lanthanide and laser using monocrystals of these silicates. The laser has a laser cavity (2) containing as the light emitter a monocrystal (4), means (12,14) for amplifying the light from the monocrystal, means (14) for removing light from the laser cavity and optical pumping means (6), characterized in that the monocrystal is of formula (I):

Mixed silicates of yttrium and lanthanide and laser using monocrystals

The invention relates to monocrystals of silicates of lanthanides usable as scintillators for the detection of X and/or gamma radiation. The lanthanide silicate complies with formula:

Monocrystals of silicates of lanthanides usable as scintillators for the

These lasers in particular have two flashlamps (30, 32) for longitudinally pumping a monocrystalline aluminate bar (28) emitting in the visible and near infrared, two mirrors (38, 40) for amplifying the light emitted by the bath, a polarizer prism (42) used for feeding the amplified light beam to the outside of the laser cavity. The magnetoplumbite-type aluminate has in particular the formula:

Mixed lanthanum-magnesium aluminates and lasers using monocrystals of

An infrared radiation reflecting substrate, having deposited thereon a first layer formed from a metal or an alloy, and a second layer deposited on the first layer and consisting of a solar radiation absorbing amorphous material, such as amorphous carbon. The substrate can be formed from an infrared radiation reflecting layer deposited on a primary substrate.

Covering for photothermal conversion

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Saint Egreve, France

Christophe Wyon