COMPACT GEOMETRY FOR DIODE-PUMPED CR-LISAF FEMTOSECOND LASER

A novel geometry for dispersion compensation in femtosecond lasers wit hout specific cut of optical parts in a flat/Brewster angle or Gires-T ournois mirrors is demonstrated far attaining a compact diode-pumped C r:LiSAF femtosecond pulse laser, In this geometry, the laser medium li es between the dispersion-compensation prism pair, This approach enabl es the laser to operate at variable repetition rates from 163 to 235 M Hz keeping the pulsewidth less than 90 fs, where the value of the time -bandwidth product are not larger than 0.34, An 89 fs pulse duration g enerated at the 235 MHz repetition rate is, to our knowledge, the shor test pulse achieved in an all-solid-state Kerr-lens mode-lacked laser operating above the 200 MHz repetition rate.