Coherent short-wavelength radiation from laser-plasma interactions is of increasing interest in disciplines including ultrafast biomolecular imaging and attosecond physics. Using solid targets instead of atomic gases could enable the generation of coherent extreme ultraviolet radiation with higher energy and more energetic photons. Here we present the… (More)
We have developed an 1-PW 30-fs Ti:sapphire laser with 0.1-Hz repetition rate. From its final booster amplifier pumped with 96-J energy, IR laser pulses with 47-J energy and flat-top spatial intensity profile have been obtained.
We demonstrate experimentally and theoretically that prepulse duration via amplified spontaneous emission (ASE) is strongly related to laser spectra in chirped-pulse amplification lasers due to pulse compressor dispersion. Although ASE prepulses overlap with stretched main pulses, we show that ASE prepulse duration can be reduced by injecting a laser pulse… (More)