Abstract: Computer networks and communication systems operating at optical frequencies convey their signals to the required destination through optical fibers. At long distances, periodic amplifications is required and this leads to the dependence of fiber refractive index on power fluctuations. This leads to non-linear effects and this produces non-linear waveform distortion. For long distance transmission at high data rate, this waveform must be suppressed. Spectral inversion is one method to overcome this problem. A scheme that is characterized as the combination of Optical Phase Conjugation (OPC) and spectral dispersion mapping is effective for non-linearity compensation in the absence of power symmetry.