Generation of a compressed pulse pair based on cross-phase modulation in single-mode fibres

The compression of weak optical pulses in a normal group-velocity dispersion regime, by higher-order solitons in the anomalous group-velocity dispersion regime of single-mode fibres, is analysed, both qualitatively and quantitatively, by computer simulation. The results show that copropagating a weak pulse with an intense pump pulse can lead to the generation of a compressed pulse pair in an optical fibre, whose minimum-dispersion wavelength is chosen such that it falls between the pump and the signal wavelength. Numerical simulation also shows that the higher the initial relative peak power of the higher-order solitons, the higher the compression factor and the peak power of the compressed pulse pair. Finally, the physical mechanism based on this compression is analysed in detail