Patent ID: 7630416

Claim:
A high-repetition-rate femtosecond Ti:sapphire regenerative amplification system comprising: a laser oscillator emitting pulses; a stretcher stretching the pulses by providing negative dispersion to the pulses using a downchirped pulse amplification scheme; a regenerative amplifier amplifying the pulses, the regenerative amplifier comprising an acousto-optic modulator for pulse switching at the repetition rate of 20-200 kHz, a pulsed green pump laser for pumping a gain medium at the repetition rate of 20-200 kHz, a resonator for reciprocating the pulses between a plurality of mirrors, and at least one broadband chirped mirror for providing negative dispersion to prevent the pulse from being shortened during the amplification; and a compressor compressing the pulses with the compression efficiency of higher than 90%.