Abstract
A new simple picosecond KrF laser source was developed by the saturated amplification of sharp leading-edge pulses generated by fast Pockels cell and stimulated Raman scattering (backward Raman pulse compression and four-wave anti-Stokes generation in methane gas). Short-laser pulses of 1.1 ps and 3.2 mJ with a beam quality closed to that of a diffraction-limited pulse were generated at a repetition rate of 10 Hz. The measured brightness contrast ratio of the main pulse to ASE was more than 1010. A stable and long-life operation has been achieved using a fast Pockels cell.
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