23.9 W, 985 fs Chirped Pulse Amplification System Based on Yb:YAG Rod Amplifier

A stable and simple Yb:YAG rod amplifier based on chirped pulse amplification in a water cooling system has been demonstrated.The output power of 38 W at a 250 kHz repetition rate with a spectrum width of 4 nm centered at 1030 nm, which support Fouriertransform limited pulse duration of 389 fs has been generated.The compressed power of 23.9 W with pulse duration of 985 fs has been obtained with a chirped volume Bragg grating compressor.The power stability is measured to be 1.414% when the output power is 35 W. The system is worthwhile to popularize for its good performance and inexpensive cost.