Ring-Type Ti:sapphire Regenerative Amplifier with a Wide Tuning Range

Abstract
Using a chirped pulse amplification technique, we have constructed a Ti:sapphire regenerative amplifier with a ring cavity. The amplified pulses with an energy of 4 mJ were compressed to 120 fs at 797 nm and 170 fs at 746 nm. The spectral distortion in the amplifier and the compressed pulse shapes were investigated at the two different wavelengths.