In the context of ultrashort pulse amplification, Single Crystal Fibers (SCF) provides several advantages that clearly benefit to the amplification of ultrashort and intense pulses. Among them, the mitigation of non-linear effects thanks to the short length of interaction together with the large beam diameter is probably the most interesting compared to rod-type amplifier. The crystalline structure provides ten times higher thermal conductivity than glass. In addition, the high gain per pass prevents the use of a regenerative amplifier and therefore significantly expands the range of operation at a high repetition rate. In a previous proof-of-principle experiment, femtosecond pulses were directly amplified from 400 mW to 12 W average power in a two-pass architecture while maintaining the duration of the 30 MHz repetition rate pulses below 400 fs [1]. In this work, we use a chirped pulse amplification system which allows to reduce the repetition rate and obtain much higher energies per pulse [2].

© 2013 IEEE

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