Investigations of chirped tan-hyperbolic pulse propagation behavior in the presence of fiber loss, dispersion and self-phase modulation of single mode fiber

摘要

Results of tan-hyperbolic pulse propagation in dispersion dominant regime as well as in the simultaneous presence of fiber loss, dispersion and self-phase modulation in single mode fiber are presented, both for initially un-chirped and chirped cases. Split-step Fourier model for nonlinear Schrodinger equation was used for this purpose. Results clearly show that in the presence of fiber nonlinearity, by increasing the steepness parameter, initially the un-chirped pulse first undergoes compression and then it goes on broadening with the propagated distance. Results also show that for higher value of steepness parameter, if the value of initial chirp goes on decreasing, peak power also increase showing the compression of the pulse and then it decreases with the propagated distance in dispersion dominant regime. The inclusion of self-phase modulation further enhances these results. These investigations provide a deeper insight for the fiber response to such type of optical pulses.