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Optical propagation in laboratory-generated turbulence
Applied Optics, 1979A versatile and useful facility for simulating the effects of atmospheric turbulence on optical propagation is described, and the relevant system parameters are characterized. The scattering medium is a turbulent liquid (ethanol) with the turbulence created by unstable convection generated by a strong vertical thermal gradient.
R A, Elliott, J R, Kerr, P A, Pincus
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Turbulent Transitions in Optical Wave Propagation
Physical Review Letters, 2016We report the direct observation of the onset of turbulence in propagating one-dimensional optical waves. The transition occurs as the disordered hosting material passes from being linear to one with extreme nonlinearity. As the response grows, increased wave interaction causes a modulational unstable quasihomogeneous flow to be superseded by a chaotic
PIERANGELI, DAVIDE +5 more
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From hexagons to optical turbulence
Conference Digest. 2000 International Quantum Electronics Conference (Cat. No.00TH8504), 2005Summary form only given. The transition from regular static patterns observed in optical systems to spatio-temporal chaotic regimes is not yet well understood. We address this problem in a ring cavity filled with a nonlinear self-focusing Kerr medium pumped by an external field.
SANTAGIUSTINA, MARCO +4 more
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Optical phase under deep turbulence conditions
Journal of the Optical Society of America A, 2014The Markov approximation for waves in random media specifies that, under strong scintillation conditions, the optical field of unbounded waves has a normal probability distribution with zero mean. Using the coherence function provided by the Markov approximation, we calculate statistics of the phase of the optical field that accounts for the presence ...
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Optical turbulence path integration: methodology
SPIE Proceedings, 2000Presently the propagation models used to assess ABL performance employ an onionskin atmosphere. Onionskin atmospheres ignore the profound horizontal intermittency in Cn2 found in experiment. The problems associated with modeling optical turbulence over shallow slant paths using balloon and aerothermal point measurements are presented.
Robert I. Reznik, Matthew M. Bold
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Optical pulses in atmospheric turbulence
Journal of the Optical Society of America, 1974Rytov’s method is generalized so that it can be applied to the time-dependent wave equation. The method is used to obtain an expression for a pulsed spherical wave that has propagated through atmospheric turbulence. The expression contains two terms. One term represents scattering by refractive-index inhomogeneities located on a direct line between the
C. S. Gardner, M. A. Plonus
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Many-parameter routes to optical turbulence
Physical Review A, 1986The output of an externally pumped passive nonlinear-optical ring resonator is known to exhibit chaotic dynamics under variation of one or more external control parameters. The dynamics of the internal transverse laser beam profile is described, in the good-cavity limit, by an infinite-dimensional discrete-time map in function space.
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Optical turbulence over paved surfaces
SPIE Proceedings, 1995Modelling refractive index turbulence over paved surfaces is of significant importance to predict limitations on optical remote sensing systems operated over roads, airport runways, or urban areas. Since optical turbulence is generated by the turbulent heat transfer between ground and atmosphere, its magnitude depends on the thermal and dynamical ...
Volker Thiermann +4 more
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Nonlinear Optics and Turbulence
1992Abstract : The ongoing and primary goal of the research is the pursuit of understanding of nonlinear processes in natural phenomena arising in optics and fluids. A considerable share of our attention is devoted to nonlinear optics, a relatively young subject, extremely rich in scientific and technological potential.
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Atmospheric Turbulence in Optical Surveillance Systems
Applied Optics, 1967The limitations imposed by atmospheric turbulence in the design of optical surveillance systems with slant optical paths are developed. Image blurring effects which determine scene contrast ratio are separated from spot dancing effects which determine signal-to-noise ratio. The relative position of each turbulent eddy with respect to scene and observer
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