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Pre-chirp managed nonlinear amplification in fibers delivering 100 W, 60 fs pulses

: Liu, Wie; Schimpf, Damian N.; Eidam, Tino; Limpert, Jens; Tünnermann, Andreas; Kärtner, Franz X.; Chang, Guoqing


Optics Letters 40 (2015), Nr.2, S.151-154
ISSN: 0146-9592
Fraunhofer IOF ()

We demonstrate a pre-chirp managed Yb-doped fiber laser system that outputs 75 MHz, 130Wspectrally broadened pulses, which are compressed by a diffraction-grating pair to 60 fs with average powers as high as 100 W. Fine tuning the pulse chirp prior to amplification leads to high-quality compressed pulses. Detailed experiments and numerical simulation reveal that the optimum pre-chirp group-delay dispersion increases from negative to positive with increasing output power for rod-type high-power fiber amplifiers. The resulting laser parameters are suitable for extreme nonlinear optics applications such as frequency conversion in femtosecond enhancement cavities.