Abstract

We discuss the role played by time-dependent scattering on light propagation in liquid crystals. In the linear regime, the effects of the molecular disorder accumulate in propagation, yielding a monotonic decrease in the beam spatial coherence. In the nonlinear case, despite the disorder-imposed Brownian-like motion to the self-guided waves, self-focusing increases the spatial coherence of the beam by inducing spatial localization. Eventually, a strong enhancement in the beam oscillations occurs when power is strong enough to induce self-steering, i.e., in the non-perturbative regime.

© 2018 Optical Society of America

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Supplementary Material (5)

NameDescription
» Visualization 1       Simulation of spatial soliton propagation using an effective bidimensional model. Input beam is 4 microns, wavelength is 1064 nm, power is 1 microWatt (linear regime propagation), the cell length along the propagation direction is 1 mm, and the initi
» Visualization 2       Simulation of spatial soliton propagation using an effective bidimensional model. Input beam is 4 microns, wavelength is 1064 nm, power is 0.5 milliWatt (stable solitonic regime), the cell length along the propagation direction is 1 mm.
» Visualization 3       Simulation of spatial soliton propagation using an effective bidimensional model. Input beam is 4 microns, wavelength is 1064 nm, power is 2 milliWatt (unstable solitonic regime), the cell length along the propagation direction is 1 mm.
» Visualization 4       Experimental observation of the light propagation in the stable solitonic regime. The light distribution is visualized acquiring the light scattered from the liquid crystal. The wavelength is 1064 nm, and the cell length is 8 mm.
» Visualization 5       Experimental observation of the light propagation in the unstable solitonic regime. The light distribution is visualized acquiring the light scattered from the liquid crystal. The wavelength is 1064 nm, and the cell length is 8 mm.

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Equations (2)

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