Amplitude Systemes

Centre National De La Recherche Scientifique

Universitë De Bordeaux

Amplitude

Université De Bordeaux I

Antoine Courjaud

Eric Mottay

Clemens Honninger

Francois Salin

Jean-Louis Doualan

François Salin

Patrice Jean-Pierre Camy

Pierre Favier

Sandrine Anne Ricaud

Fabien Zomer

Frederic Pierre Henri Jacques Druon

Frédéric Pierre Henri Jacques Druon

Disclosed is a system for generating a spatially localized, high-intensity laser beam, including: a laser source designed to generate a burst of N laser pulses with a duration of less than or equal to one picosecond, the N laser pulses having a first repetition frequency greater than or equal to 0.5 gigahertz; a resonant optical cavity designed to receive and store the burst of N laser pulses, the resonant optical cavity being designed to focus the burst of N laser pulses in an interaction region of the resonant optical cavity; and a servo control system designed to control the first repetition frequency relative to the roundtrip distance in the resonant optical cavity, such that the N pulses of the burst are superimposed temporally and spatially by constructive interferences in the interaction region so as to form one giant ultra-short and high-energy pulse.

System and method for generating a spatially localised high-intensity laser beam

Disclosed is a UV-visible laser system having ultrashort pulses with high power and/or high energy. The laser system includes at least one non-linear optical crystal () adapted for receiving two distinct ultrashort laser pulses () in the visible or infrared domain emitted respectively by two distinct laser pulse sources () and a temporal synchronization unit () adapted so that the two ultrashort laser pulses () are superimposed in time and space in the non-linear optical crystal () with any phase shift, and generate, by sum frequency, an ultrashort laser pulse () having an optical frequency equal to the sum of the respective optical frequencies of the two distinct laser pulses ().

UV-visible laser system having ultrashort highpower and/or high-energy pulses

A system and method for generating a burst of ultra-short, high-power laser pulses, the system includes elements for generating laser pulses having a repetition period &#x3c4;, amplification elements including an optical amplifier medium, a regenerative optical cavity, elements for injecting the laser pulses into the regenerative optical cavity, and elements for extracting the laser pulses from the regenerative optical cavity. The regenerative optical cavity has a total length such that the duration of a round trip of each pulse is between N&#x2212;1 and N times the period &#x3c4;, wherein N is an integer higher than or equal to 2, the injection elements are adapted for trapping a burst of N laser pulses in the regenerative optical cavity, the extraction elements are suitable to extract the burst of N laser pulses from the regenerative optical cavity, and the optical amplifier medium is suitable for forming a burst of amplified laser pulses.

System and method for generating a burst of ultra-short, high-power laser pulses

A high-gain optical amplifier for a wave to be amplified at a wavelength referred to as the emission wavelength, includes: optical pumping elements () producing a pump wave at a wavelength referred to as the pump wavelength; a solid amplifying medium () that is doped with active ions, the solid amplifying medium being capable of emitting laser radiation at the emission wavelength when the medium is pumped by the pumping elements; cooling elements () capable of cooling the solid amplifying medium to a temperature of no higher than 250 Kelvin; and optical multiplexing elements capable of coupling together the pump wave and the wave to be amplified in the amplifying medium. The amplifying medium has Stark sublevels contained within a spectral domain ranging over less than 200 cm(approximately 20 nm, when expressed in wavelength). A laser including a resonant optical cavity and an amplifier are also described.

Optical amplifier and laser incorporating such an amplifier

A rare earth ion ultrashort laser source includes a resonant cavity having a first output face partially reflecting and a second reflecting face. The source also includes a first active material, which receives a pump luminous flux transmitted via a first solid laser pump source. The resonant cavity exhibits a length of optical path travelled by the pulses greater than 7.5 m so that the pulsed energy Eis greater than 100 nJ, the optical path including at least one passage in the active material and the ultrashort laser source includes elements for lengthening the resonant cavity thereby enabling to extend the length of the optical path travelled by the luminous pulses in the resonant cavity, the ABCD propagation matrix of the resonant cavity being close to the unit matrix so that the features of the luminous beam going back and forth in the resonant cavity remain unchanged.

Ultra-short laser source with rare earth ions and stable pulse train and device for lengthening a laser cavity

Growing community of inventors

Leognan, France

Antoine Courjaud