Institut Franco-allemand De Recherches De Saint-louis

Antoine Hirth

Antoine Simon

Marc Eichhorn

Klaus-Herbert Schetter

Christelle Kieleck

The present invention relates in particular to the field of lasers and in particular to a laser source having a neodymium-doped crystal () or fiber and pumpable by pumping means () and a non-linear Raman effect converter stimulated in methane (), characterized in that the crystal () or fiber pumped by said pumping means () is able to emit a laser radiation at a wavelength between 1.31 and 1.36 &#x3bc;m and in that the Raman converter () is able to convert the radiation generated by the crystal () or by the fiber into at least one second radiation () with a wavelength between 2 and 2.3 &#x3bc;m.

Infra-red multi-wavelength laser source

The invention is in the field of laser radiation generation in bands II and III, and relates to a device for generating laser radiation in the infrared having means for modifying the amplified-radiation frequency and using the Raman effect, characterized by additionally having at least one diode able to emit laser radiation in the 1.8-2.1 &#x3bc;m frequency range, at least one current generator able to generate current levels at an adjustable repetition rate, means for supplying said current levels to said diode, and means for amplifying the laser radiation emitted by said diode and comprised of at least one fiber doped with an ion having laser activity in the diode emission range.

Device for generating laser radiation in the infrared

The power supply of a laser tube which, according to the invention comprises devices for pulse formation and means for pulse triggering and is characterized in that it contains a pre-ionization circuit (4, 6) to form a pre-ionization pulse, and an excitation circuit (17, 22) to form an excitation pulse, and devices for synchronization (15) of the pre-ionization pulse and the excitation pulse.

Power supply unit for a laser tube

According to the invention, the metal vapor laser tube comprises a cylindrical plasma tube (1), which is located inside a leak-proof container (2) and which is surrounded by a thermal insulating material, an electrode (6) at each end of the plasma tube, and a cylindrical return conductor (9) coaxial to the plasma tube (1) which is connected with one of the electrodes, and characterized in that the return conductor (9) has a radius R of about: ##EQU1## where: e=exponential function,

Growing community of inventors

Niffer, France

Antoine Hirth