Existence of optical solitons on wavelength division multiplexed beams in a nonlinear fiber

A simple analytic expression for the initial fundamental optical solitons o n wavelength division multiplexed (WDM) beams in a nonlinear fiber has been found. For an ideal fiber with no loss and uniform group-velocity dispersi on (GVD) in the anomalous GVD region, the initial form is [1+2(M-1)](-1/2) sech(tau), where M is the number of WDM beams and tau is the normalized tim e. Computer simulation shows that these initial pulses on WDM beams in this fiber will propagate undistorted without change in their shapes for arbitr arily long distances. The discovery of the existence of solitons on WDM bea ms presents the ultimate goal for optical fiber communication on multiple w avelength beams in a single fiber. [S1063-651X(99)06208-X].