Figure 6.

The pulse shapes with and without δγ. <sup>β</sup><sup>2</sup> ¼ �21:7 ps<sup>2</sup> ð Þ <sup>=</sup>km , <sup>s</sup> <sup>¼</sup> <sup>0</sup>:01, <sup>γ</sup> <sup>¼</sup> <sup>1</sup>:<sup>3</sup> ð Þ <sup>=</sup>km=<sup>W</sup> . Other parameters are the same as Figure 5.

