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. 2015 Mar 19;6:6611. doi: 10.1038/ncomms7611

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Shown in the top row (a–c) are results including short and long trajectories, whereas the bottom row (d–f) shows results for identical simulation values, but with the long trajectory numerically removed. Panels a,d show the generated spatiotemporal profile in focus; (b,e) angular-spectral profile in the far field, for an angular range of 5.5 mrad; (c,f) spectrogram of the pulse, calculated for the electric field along the dotted line in a. The case for long trajectories is only displayed in the Supplementary Information for completeness.