Abstract
We have theoretically studied pulse propagation in a normal-dispersion optical cubicon fiber amplifier with an arbitrary longitudinal gain profile, and we have obtained expressions for the phase , chirp , and amplitude for such amplifiers when the nonlinear phase shifts and the third order dispersion (TOD) are all included. The results show that the characteristics of self-similarity and linear chirp are lost due to the TOD. However, by using mutual compensation between the nonlinear phase and the TOD, we can still obtain a pulse with optimal compression. Furthermore, for a given TOD, there exists an optimal nonlinear phase for compressing the pulse. A numerical simulation is consistent with the analytical results.
© 2010 Optical Society of America
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