Amplitude Technologies

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Pierre-Mary Paul

Olivier Gobert

Luc Vigroux

Michel Comte

Jean-Francois Hergott

Fabien Ple

Jean-François Hergott

The present invention relates to a high-power femtosecond pulsed laser, the laser including: a source able to generate a train of input laser pulses having an envelope frequency and a carrier frequency; a chirped pulse amplification unit; and, a unit for controlling the phase drift between the envelope frequency and the carrier frequency of the output laser pulses. According to the invention, the unit for controlling the phase drift between the envelope frequency and the carrier frequency includes electro-optical phase-modulation unit that are placed on an optical path of the chirped pulse amplification unit in order to stabilize the phase drift between the envelope frequency and the carrier frequency of the output laser pulses as a function of time.

Stabilized femtosecond pulsed laser and stabilization method

A high power solid-state non-regenerative optical amplification system () for amplifying a pulsed optical beam, includes a first optical amplification crystal (C) and a second optical amplification crystal (C) for amplifying the optical beam; optical pumping elements for longitudinal pumping amplification crystals (C, C); reflective optical elements (M', M&#x2032;, . . . , M&#x2032;) suitable for reflecting the optical beam so that the optical beam makes a total number of N sequential passes through the amplification crystals (C, C), wherein N is an integer and N&#x3e;4. The reflective optical elements (M&#x2032;, M&#x2032;, . . . , M&#x2032;) are placed in a configuration suitable for alternatively interleaving the sequential optical beam passes through the 1crystal (C) and through the 2crystal (C). A solid-state laser including the amplification system, and a method for amplifying a pulsed optical beam in a two-crystal multi-pass non-regenerative amplification system are also disclosed.

High power solid-state optical amplification process and system

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Draveil, France

Pierre-Mary Paul