Abstract
Kilohertz repetition rate amplifiers of femtosecond pulses turned out to be a powerful tool in spectroscopy during the last years. A number of schemes based on the concept of chirped pulse amplification (CPA)1 have been devised. Recent advances in the CPA technique resulted in amplification of optical pulses of ≈ 30 fs beyond the TW level at a repetition rate of 10 Hz.2–3 Amplifier systems with kHz repetition rates produce femtosecond pulses with energies up to 1 mJ.4–5 Gain narrowing and residual high-order dispersion due to an imperfect matching between the pulse stretcher and compressor have been identified as the major performance limiting effects.
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