Saturation of fluctuations of the intensity of laser radiation at large distances in a turbulent atmosphere (Fraunhofer zone of transmitter)

Gochelashvili, K. S.; Pevgov, V. G.; Shishov, V. I.

doi:10.1070/qe1974v004n05abeh008143

Cited by 11 publications

(5 citation statements)

References 5 publications

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“…[4], which are different from those in Ref. [14]. Numerical results also show different behaviours in the strong regime.…”

Section: The Apha Scintillation Theorycontrasting

confidence: 85%

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Scintillation index of optical wave propagating in turbulent atmosphere

Rao

2009

Chinese Phys. B

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A concise expression of the scintillation index is proposed for a plane optical wave and a spherical optical wave both propagating in a turbulent atmosphere with a zero inner scale and a finite inner scale under an arbitrary fluctuation condition. The expression is based on both the results in the Rytov approximation under a weak fluctuation condition and the numerical results in a strong fluctuation regime. The maximum value of the scintillation index and its corresponding Rytov index are evaluated. These quantities are affected by the ratio of the turbulence inner scale to the Fresnel size.

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“…[4], which are different from those in Ref. [14]. Numerical results also show different behaviours in the strong regime.…”

Section: The Apha Scintillation Theorycontrasting

confidence: 85%

“…The expressions of κ x and κ y are established through a comparison between the results deduced from the modified spectrum and the results obtained from the asymptotic formula in the saturation regime of Ref. [14]. There are some asymptotic results for the saturation regime in Ref.…”

Section: The Apha Scintillation Theorymentioning

confidence: 99%

Scintillation index of optical wave propagating in turbulent atmosphere

Rao

2009

Chinese Phys. B

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“…Scintillation is one of the major limiting factors in atmospheric communication and imaging systems operating at optical frequencies and is therefore investigated both theoretically and experimentally by many researchers. [1][2][3][4][5][6][7][8][9][10][11][12] Excellent coverage on the results of these contributions is included in the books by Tatarskii, 13 Ishimaru, 14 Andrews and Phillips, 15 and Andrews et al 16 In these studies, fundamental laws of intensity fluctuations of optical waves in turbulent atmosphere in the regimes of both weak and strong turbulence have been investigated in detail. The results produced from these studies mainly concern the Gaussian beam wave and the limiting cases, namely, spherical and plane waves.…”

Section: Introductionmentioning

confidence: 99%

Scintillations of cos-Gaussian and annular beams

Eyyuboğlu

Baykal

2007

J. Opt. Soc. Am. A

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Based on the generalized beam formulation, we derive the scintillation index and selectively evaluate it for cos-Gaussian and annular beams propagating in weak atmospheric turbulence. Dependence of the scintillation index on propagation length, focusing and displacement parameters, wavelength of operation, and source size are individually investigated. From our graphical outputs, it is observed that a cos-Gaussian beam exhibits lower scintillations and thus has a tendency to be advantageous over a pure Gaussian beam particularly at lower propagation lengths. It is also found that at longer propagation lengths, this advantage switches to the side of the annular beam. Furthermore, the scintillation index of a focused annular beam will be below those of both Gaussian and cos-Gaussian beams starting at earlier propagation distances. When analyzed against source sizes, it is seen that cos-Gaussian beams will offer advantages at relatively large source sizes, while the reverse will be applicable for annular beams.

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“…Simulation methods are proposed and the results of numerical simulation are given in [7,8]. The theory of strong fluctuations is developed in [9,10], in particular, for spherical waves [9,11]. However, these papers provide no convincing evidence for the existence of significant negative correlation of intensity fluctuations of a spherical wave, which is required to satisfy condition (12).…”

Section: Basic Relationsmentioning

confidence: 99%

Backscatter amplification in a turbulent atmosphere and the law of conservation of energy

Banakh,

Falits,

Zaloznaya

2023

29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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It is demonstrated how the energy is redistributed and the law of conservation of energy is fulfilled when optical radiation reflecting in a turbulent atmosphere. It is found that the mean intensity of an optical beam, scattered by a point reflector or by an ensemble of point reflectors in a turbulent atmosphere, increases in the strictly backward direction (backscatter amplification (BSA) effect) at the expense of overflow of the energy from a huge area several orders of magnitude exceeding the BSA effect localization area.

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Saturation of fluctuations of the intensity of laser radiation at large distances in a turbulent atmosphere (Fraunhofer zone of transmitter)

Cited by 11 publications

References 5 publications

Scintillation index of optical wave propagating in turbulent atmosphere

Scintillation index of optical wave propagating in turbulent atmosphere

Scintillations of cos-Gaussian and annular beams

Backscatter amplification in a turbulent atmosphere and the law of conservation of energy

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