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. 2017 Jul 3;8(8):3526–3537. doi: 10.1364/BOE.8.003526

Fig. 2.

Fig. 2

SH FROG characterization of the compressed pulses from our Yb-fiber CPA. Left panel: laser output spectrum, together with the reconstructed spectral phase of system I (solid red curve) and system II (dotted red curve). Center panel: reconstructed temporal intensity profile (black) and intensity autocorrelation (blue) of system I. The measured pulse duration is 258 fs FWHM, and corresponds well to the expected pulse duration taking into account the amplified spectrum and residual (uncompensated) higher-order chirp calculated for system I (red). Right panel: reconstructed temporal intensity (black) and intensity autocorrelation (blue) of system II. The measured pulse duration is 310 fs FWHM, corresponding well to the expected pulse duration taking into account the amplified spectrum and residual (uncompensated) higher-order chirp calculated for system II (red).