Mechanisms of self-similar pulses generation in a normal dispersion-decreasing fiber |
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Authors: | Feng You-ceng and Xia Ge |
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Affiliation: | College of Electronics Information Engineering, South-central University for Nationalities, Wuhan 430074, China;College of Electronic and Electrical Engineering, Wuhan Textile University, Wuhan 430073, China |
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Abstract: | Based on the principle of virtual equivalent gain, the evolution of self-similar pulses in a normal dispersion-decreasing
fiber is investigated. The occurrence of wave breaking during the process under highly nonlinear conditions and the effect
of its revealed four-wave mixing on the process are also analyzed. The results indicate that the pulse spectrum broadening
in the initial stage is dominated by self-phase modulation while by four-wave mixing in the later stage. The more intense
nonlinearity is, the faster the pulse evolution converges to the self-similarity synchronously in both the time domain and
the spectrum domain. |
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Keywords: | |
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