Here, pulses from a cw diode-pumped amplifier are spectrally broadened in an Ar- or Ne-filled hollow-core fiber and recompressed to (Ar) and (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 permits favorable energy scaling for the hollow-fiber technique compared to ultrafast amplifiers operating at .
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