Results 171 to 180 of about 657 (221)
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Beam wander of laser beam propagating through oceanic turbulence
Optik, 2016Abstract The analytical expressions for beam wander of collimated and focused beam in oceanic turbulence are derived. Compared with the previously integrating ones, it can be seen that the two results are in agreement with each other exactly for the collimated and focused beam, respectively. Further, the influences of three main oceanic parameters (i.
Zhiqiang Wang +2 more
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Beam wander of quantization beam in a non-Kolmogorov turbulent atmosphere
Optik, 2013Abstract The effects of the non-Kolmogorov parameter α of turbulent spectrum on beam wandering of quantization Gaussian light propagating through turbulent aberration channel and turbulent tilt-aberration channel are studied based on the model of the effective photon annihilation/creation operator.
Congfang Si, Yixin Zhang
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Beam wander of partially coherent twisted elliptical vortex beam in turbulence
Optik, 2020Abstract Based on the generalized Huygens–Fresnel theorem, the characteristics of beam wander in partially coherent elliptical vortex beams in anisotropic non-Kolmogorov turbulence are studied. Considering not only the vortex phase but also the twisted phase modulation in the partially coherent beams, the study of twisted phase modulation is carried ...
Lin Wang +4 more
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Gaussian-beam wander characteristic of horizon propagation
2011 IEEE International Conference on Microwave Technology & Computational Electromagnetics, 2011A model of the modified Rytov method is derived based on the wander in the original theory, this method takes into account the outer scale and the impact of multiple scattering on the wander, wander formula for certain improvements, and more with the experimental data. Analysis all kinds of factors of the wander variance.
Yiping Han
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Effects of anisotropic turbulence on the long term beam spread and beam wander of Gaussian beam
Optik, 2018Abstract Experiments and theoretical investigations have shown that the isotropic turbulence is not the only possible turbulence in the atmosphere. Researches about the anisotropic non-Kolmogorov have attracted more and more attentions recently.
Cui Linyan
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Beam wander of an Airy beam with a spiral phase
Journal of the Optical Society of America A, 2014Beam wander of an Airy beam with a spiral phase in turbulence is investigated. Using the Wigner distribution function, analytical expressions for the second-order moments and second central moments of an Airy beam with a spiral phase in turbulence are derived.
Wei, Wen, Xiuxiang, Chu
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Wander of an optical beam in the turbulent atmosphere
Applied Optics, 1990A simple, analytic, geometrical optics expression for the variance of the beam displacements caused by propagation through weak refractive turbulence described by the Kolmogorov spectrum is presented. The analytical formula includes the effect of the divergence or convergence of the initial beam.
J H, Churnside, R J, Lataitis
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Measurement and modeling of beam wander
SPIE Proceedings, 2011We investigate the effects of beam wander on an uncorrected laser system. The goal is to enable an accurate assessment of irradiance at a receiver or target for a shipboard laser system, and in this paper we show that a maritime surface layer turbulence model is important for an accurate vertical profile.
Steve Hammel +2 more
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Beam Wander and the Scintillation Index
Optical Sensors and Sensing Congress, 2020Beam wander associated with a propagating beam in the atmosphere has impact on the short-term and long-term spot size, and the scintillation index. New theoretical models are presented here for beam wander and beam-wander-induced scintillation index. These models are then compared with computer simulation results.
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Beam wander of a partially coherent Airy beam in oceanic turbulence
Journal of the Optical Society of America A, 2018The beam wander of a partially coherent Airy beam in oceanic turbulence is investigated with the help of the extended Huygens-Fresnel integral formula. Analytical expression for the second-order moment and the beam wander of a partially coherent Airy beam propagating in oceanic turbulence is derived.
Ying, Jin +11 more
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