Browsing by Subject "Nonlinear waves"
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Item Open Access Nonlinearity engineering of mode-locked fiber lasers: Similariton and soliton-similariton lasers(IEEE, 2011) İlday F. Ömer; Öktem, Bülent; Ülgüdür, CoşkunFiber lasers are attractive with their simplicity, high powers and low cost. However, propagation of short pulses in optical fiber leads to nonlinear effects, which limit the technical performance. These effects drive rich dynamics, which is interesting from a fundamental perspective. The nonlinear waves community has unraveled the fascinating world of solitons and similaritons through experiments in fibers. This paper overviews the recent development of the soliton-similariton laser. The original similariton laser was the first to work with nonlinear effects, rather than minimizing or compensating them. In the soliton-similariton laser, the propagation is strongly nonlinear everywhere. © 2011 IEEE.Item Open Access Soliton-similariton fibre laser(Macmillan Publishers, 2010-03-21) Öktem, Bülent; Ülgüdür, Coşkun; İlday, F. ÖmerRapid progress in passively mode-locked fibre lasers is currently driven by the recent discovery of new mode-locking mechanisms, namely, the self-similarly evolving pulse (similariton) and the all-normal-dispersion (dissipative soliton) regimes. These are fundamentally different from the previously known soliton and dispersion-managed soliton (stretched-pulse) regimes. Here, we report a fibre laser in which the mode-locked pulse evolves as a similariton in the gain segment and transforms into a regular soliton in the rest of the cavity. To our knowledge, this is the first observation of similaritons in the presence of gain, that is, amplifier similaritons, within a laser cavity. The existence of solutions in a dissipative nonlinear cavity comprising a periodic combination of two distinct nonlinear waves is novel and likely to be applicable to various other nonlinear systems. For very large filter bandwidths, our laser approaches the working regime of dispersion-managed soliton lasers; for very small anomalous-dispersion segment lengths it approaches dissipative soliton lasers. .