Abstract
In this paper, we summarize some of the recent results obtained by the soliton group at Osaka University. The main objective is to study nonlinear pulse propagation in ultra-fast optical communication lines having dispersion management. For the case of soliton system, the main purpose of the dispersion management is to reduce several effects such as radiations from the pulse due to lumped amplifiers compensating the fiber loss [1, 2], modulational instability [4], jitters caused by the collisions between signals in different channels of the wavelength-division-multiplexing (WDM) [5, 6, 7], the Gordon-Hans effect resulting from the interaction with noise [8, 9], and to set a desired average value of the dispersion [10, 4] (see also a review paper [11]). It was pointed out in numerical studies [12, 13] that in such a line the pulse is deformed from the ideal soliton, i.e., it has a chirp and requires an enhanced power when compared with the soliton case with a uniform dispersion. Such a pulse is now called dispersion managed (DM) soliton, and seems to be quite stable. This is one of the main object studied in this paper. We also discuss the deformation of the conventional non-return-to-zero (NRZ) pulse based on an integrable model.
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Cautaerts, V., Kodama, Y., Maruta, A., Sugahara, H. (1999). Nonlinear Pulses in Ultra-Fast Optical Communications. In: Zakharov, V.E., Wabnitz, S. (eds) Optical Solitons: Theoretical Challenges and Industrial Perspectives. Centre de Physique des Houches, vol 12. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-03807-9_9
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DOI: https://doi.org/10.1007/978-3-662-03807-9_9
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