Bistable Laser Schemes
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In a laser with a saturable absorber, bistability and hysteresis variation of the output power with pump variation exist. If such a laser has a large aperture, and diffraction serves as the dominant mechanism of transverse coupling, formation is possible of laser solitons — stable “bright” islands of lasing on a background of a “black” nonlasing state over the rest of the aperture. Similar dissipative localized structures arise in cavity-less schemes of “convective bistability” — a continuous medium with nonlinear amplification and absorption. The set of laser solitons includes structures with the following characteristics: geometrically one-, two-, and three-dimensional; stationary and oscillating; transversely motionless, moving, and rotating; with a regular wavefront and with screw dislocations of different orders; and single and bound configurations. Interaction of laser solitons and their interaction with the scheme inhomogeneities can lead to changes in soliton type and number.
KeywordsHopf Bifurcation Saturable Absorber Soliton Interaction Fundamental Soliton Soliton Width
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