Abstract

Here, 200fs 6mJ pulses from a cw diode-pumped Yb,Na:CaF2 amplifier are spectrally broadened in an Ar- or Ne-filled hollow-core fiber and recompressed to 20fs (Ar) and 35fs (Ne) using a prism pair. The results of spectral broadening and phase measurement are in excellent agreement with numerical modeling based on the generalized nonlinear Schrödinger equation. The longer laser wavelength of 1030nm permits favorable energy scaling for the hollow-fiber technique compared to ultrafast amplifiers operating at 800nm.

© 2011 Optical Society of America

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