On the basis of the analysis of the effects of high-power Er-Yb co-doped double-clad optical fiber amplifiers on multi-wavelength signal transmission properties and especially of the investigations of multi-wavelength signal degeneration at different optical power levels
the optical nonlinearities at high power levels and the laws in specific applications are analyzed and some helpful conclusions are obtained
providing certain basis for the transmission of high power multi-wavelength optical signals.