  We investigate a generalized coupled nonlinear Schrodinger (GCNLS) equation
containing Self-Phase Modulation (SPM), Cross-Phase Modulation (XPM) and Four
Wave Mixing (FWM) describing the propagation of electromagnetic radiation
through an optical fibre and generate the associated Lax-pair. We then
construct bright solitons employing gauge transformation approach. The
collisional dynamics of bright solitons indicates that it is not only possible
to manipulate intensity (energy) between the two modes (optical beams), but
also within a given mode unlike the Manakov model which does not have the same
freedom. The freedom to manipulate intensity (energy) in a given mode or
between two modes arises due to a suitable combination of SPM, XPM and
FWM.While SPM and XPM are controlled by an arbitrary real parameter each, FWM
is governed by two arbitrary complex parameters. The above model may have wider
ramifications in nonlinear optics and Bose-Einstein Condensates (BECs).
