Fig. 14
From: Optical vortices in waveguides with discrete and continuous rotational symmetry
Evolution of the input Gaussian pulses [Eq. (29)] with the parameters P=0.687 and τ=1.775 injected in all cores of hexagonal 7-core MCF (best combining) (a). The input intensity distribution in the central core (dashed red line) and the distribution at compression point (solid blue line) are shown in logarithmic (b) and normal (c) scales. 91.6% of total input energy E is combined in the core (0,0). The pulse width (FWHM) is reduced by 6.37x. The peak power increases in 37.7x