Fig. 10
From: Optical vortices in waveguides with discrete and continuous rotational symmetry
Dependence of the percentage of total energy E combined in the core with pulse compression (a) and the pulse width compression factor in the logarithmic scale (b) on the initial pulses [Eq. (28)] parameters P and τ for 7-core MCF with ring core configuration and modulation coefficient M=0.3. The isoline E=Ecr=4π is indicated by the yellow dots, the level H=0 is depicted by white dashes