Incoherently coupled multi-color vector solitons in strongly nonlocal nonlinear media

We investigate the incoherently coupled multi-color vector solitons in strongly nonlocal nonlinear media. Results show that multi-color vector spatial solitons are fundamentally a collective effect, where all the frequencies participate in the process, and self-adjust their respective contributions to the formation, thus forming the same waveguide and guide all the frequencies. Moreover, we find that when the soliton is formed, the soliton width is larger for lower frequencies (longer wavelengths) and shorter for higher frequencies (shorter wavelengths) independent of their input power spectrum. Pertinent numerical examples are presented to show their properties further.