Femtosecond regenerative amplification in Cr : forsterite at 5-10 kHz

Abstract

We developed a high-power oscillator-regenerative amplifier femtosecond laser system. Based on chromium-doped forsterite. The system is operating near 1.25 mum at a 5-10 kHz repetition rate. Chirped-pulse amplification produced 0.86 W (0.75 W) of average power, or 465 mW (400 mW) after compression at 5 kHz (10 kHz). Nearly bandwidth-limited pulses of duration 135 fs (shortest) and 150 fs; (typical) are available with an energy of 93 muJ and 40 muJ at 5 and 10 kHz, respectively