The FTL (dashed) and real solutions of pulse length for .
For different energy values, , , , and , and the corresponding values are the normalized pulse lengths for (a) FTL and (b) nonlinear cases.
Schematic illustration of the conservative propagation regime and ionized zone after collapse.
Difference between the FTL (dashed) and real solutions when the initial chirp parameter is positive
The pulse length for various powers , , , , and shows the nonlinear compression followed by an expansion due to GVD.
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