Soliton generation from randomly modulated return-to-zero pulses |
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Authors: | Stanislav A Derevyanko Jaroslaw E Prilepsky |
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Institution: | aPhotonics Research Group, Aston University, Aston Triangle, Birmingham B4 7ET, UK;bB.I. Verkin Institute for Low Temperature Physics and Engineering, NASU, 47 Lenin Avenue, Kharkov 61103, Ukraine |
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Abstract: | We consider return-to-zero (RZ) pulses with random phase modulation propagating in a nonlinear channel (modelled by the integrable nonlinear Schrödinger equation, NLSE). We suggest two different models for the phase fluctuations of the optical field: (i) Gaussian short-correlated fluctuations and (ii) generalized telegraph process. Using the rectangular-shaped pulse form we demonstrate that the presence of phase fluctuations of both types strongly influences the number of solitons generated in the channel. It is also shown that increasing the correlation time for the random phase fluctuations affects the coherent content of a pulse in a non-trivial way. The result obtained has potential consequences for all-optical processing and design of optical decision elements. |
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Keywords: | Random phase modulation Nonlinear Schrö dinger equation Optical solitons |
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