Propagation of short different-wavelength optical pulses in many-level absorbers is studied. New analytic solutions to the appropriate Maxwell-Bloch equations having the form of simultaneous different-wavelength optical solitons, so called simulton solutions, have been found. In order for simulton propagation to occur, both the pulses and the medium have to be initially prepared in a manner determined by the medium's physical parameters. The analytic findings are extended with the use of numerical modelling. © 1981.
Konopnicki, M. J., Drummond, P. D., & Eberly, J. H. (1981). Theory of lossless propagation of simultaneous different-wavelength optical pulses. Optics Communications, 36(4), 313–316. https://doi.org/10.1016/0030-4018(81)90382-5