Fig. 15
From: Optical vortices in waveguides with discrete and continuous rotational symmetry
Evolution of the input Gaussian pulses [Eq. (29)] with the parameters P=536 and τ=3.2 injected in all cores of a hexagonal 7-core MCF (best compression) in the logarithmic scale (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. 16.6% of total input energy E is combined in the core (0,0). The pulse width (FWHM) is reduced by 256.3x. The peak power increases in 21.85x