Center for Algorithmic and Robotized Synthesis

Brief description of 4-PW Ti:sapphire Laser​

A 4-PW Ti:sapphire laser based on a chirped-pulse amplification technique has been operated at a repetition rate of 0.1 Hz. The laser is composed of a front-end laser system, a pulse stretcher, an OPCPA stage, two power amplifiers, two boost amplifiers and a pulse compressor. The cross-polarized wave generation and the OPCPA stages were used to compensate for the spectral narrowing and to enhance the temporal contrast. The final spectral width was maximized by shaping the OPCPA output spectrum for compensation of the gain depletion effect during amplification. After the final booster amplifier, the amplified laser pulses had a high energy of 112 J and a shot-to-shot energy stability of 1.5% (RMS). The final compressed laser pulse had a 83-J energy and a sub-20-fs duration. This 0.1-Hz 4-PW laser boosts greatly the progress in the relativistic laser-matter interaction and strong-field quantum electrodynamics.

Specifications of 4-PW Ti:sapphire Laser​