From pulse shape and spectrum,the influences of the third-order dispersion,self-steepening and intrapulse stimulated Raman scattering on the propagation property of the high-order solitons are analysed.

This paper using the symmetrical split-step Fourier′ method simulates the pulse of high-order solitons transmission characteristic in self-steepening effect and broadening of pulse and spectrum situation.

The numerical results show that the self-frequency shift and self-steepening make the pulse drift backward nonlinearly,and the drift of the former pulse smaller than that of the latter.

First,through the basic principle proof and algorithm inferential reasoning, the steep and kurtosis analytic method and the logarithm power spectrum correlation function analyzing method are proposed, which are suitable to revolve the initial faults of rotating machinery.