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We present the characteristics of a high-energy ultrafast Yb-fiber laser system, based on a Mamyshev oscillator and a subsequently arranged fiber amplifier stage. The Mamyshev oscillator emits pulses at a repetition rate of 11 MHz and pulse energies of 31 nJ. These pulses are spectrally filtered and amplified in a Yb-doped fiber up to 1 μJ pulse energy which could be temporally dechirped to less than 50 fs autocorrelation duration. We discuss the scaling as well as limiting options related to pulse energies and duration.
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Paul Repgen, Dieter Wandt, Uwe Morgner, Jörg Neumann, Dietmar Kracht, "Amplification of ultrafast pulses in an extended Mamyshev regenerator," Proc. SPIE 11260, Fiber Lasers XVII: Technology and Systems, 112600P (21 February 2020); https://doi.org/10.1117/12.2546176