Fig. 12
From: Optical vortices in waveguides with discrete and continuous rotational symmetry
Evolution of the input Gaussian pulses [Eq. (28)] with the parameters P=0.436, τ=42.5 and M=0.3 injected in all cores of ring 7-core MCF (best compression) (a). Corresponding input intensity distribution in core 7 (dashed red line) and the distribution at compression point (solid blue line) are shown in logarithmic (b) and normal (c) scales. 35.8% of total input energy E is combined in the 7th core. The pulse width (FWHM) is reduced by 307.6x. The peak power increases in 123.7x