Propagation of Gaussian Schell-model beams through a jet engine exhaust

Ding, Chaoliang; Korotkova, Olga; Li, Daliang; Zhao, Daomu; Pan, Liuzhan

doi:10.1364/oe.381242

Cited by 17 publications

(24 citation statements)

References 51 publications

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“…(32) reduce to the CSD of a GSM beam, which is consistent with the result in Ref. [8]. On substituting ρ 1 = ρ 2 = ρ into Eq.…”

Section: Propagation Of a Gsm Beam Array In The Jet Engine Plume Regionsupporting

confidence: 89%

“…κ is the magnitude of twodimensional spatial frequency. Considering propagation of laser beam within a jet engine exhaust induced turbulence region, the anisotropic power spectrum proposed by Sirazetdinov et al [7], [8]…”

Section: Propagation Of a Gsm Beam Array In The Jet Engine Plume Regionmentioning

confidence: 99%

“…The parameters Q and L s are obtained by fitting to experimental data. Ding et al has shown that the inner scale has a noticeable impact when the power spectrum is in the high spatial frequency region [8]. Further, the parameter c(α) is defined as…”

Section: Propagation Of a Gsm Beam Array In The Jet Engine Plume Regionmentioning

confidence: 99%

“…Among these studies, most reports are about fully coherence light. Recently, Ding et al extended the research and investigated the propagation of GSM in jet engine turbulence [8].…”

Section: Introductionmentioning

confidence: 99%

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Propagation Properties of Gaussian Schell-Model Beam Array in the Jet Engine Exhaust Induced Turbulence

et al. 2020

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The effects of the jet engine turbulence on a Gaussian Schell-Model (GSM) beam array propagating in a jet engine plume are studied theoretically. The analytical expressions of the cross-spectral density (CSD) function, the spectral degree of coherence (DOC) and the mean-squared beam width for a GSM beam array propagating through a jet engine plume region are derived based on the extended Huyens-Fresnel integral. It is found that the profile of spectral density and the DOC of a GSM beam array gradually transfer to an elliptical shape as the propagation distance increases, and the elliptical degree becomes greater with increasing source coherence length. Besides, as the source coherence length decreases, the effect of the jet engine turbulence on the beam broadening is smaller and the profile of the DOC appears sidelobes at short distance. It is also found that the values of effective coherence width nearly remain the same for different values of source coherence length after propagating a certain distance. Furthermore, the effects of the number of beamlets on the beam width and effective coherence width are investigated in detail.

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“…(32) reduce to the CSD of a GSM beam, which is consistent with the result in Ref. [8]. On substituting ρ 1 = ρ 2 = ρ into Eq.…”

Section: Propagation Of a Gsm Beam Array In The Jet Engine Plume Regionsupporting

confidence: 89%

Section: Propagation Of a Gsm Beam Array In The Jet Engine Plume Regionmentioning

confidence: 99%

Section: Propagation Of a Gsm Beam Array In The Jet Engine Plume Regionmentioning

confidence: 99%

“…Among these studies, most reports are about fully coherence light. Recently, Ding et al extended the research and investigated the propagation of GSM in jet engine turbulence [8].…”

Section: Introductionmentioning

confidence: 99%

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Propagation Properties of Gaussian Schell-Model Beam Array in the Jet Engine Exhaust Induced Turbulence

et al. 2020

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“…Light propagation analysis through turbulence with the jet-stream spectrum slightly modified for integral convergence was performed in [97]. In addition, the behavior of higher-order statistics of light in non-classic turbulence was also studied by other methods, e.g., the Rytov method.…”

Section: Theoretical Predictions For Non-classic Turbulence-light Interactionsmentioning

confidence: 99%

Non-Classic Atmospheric Optical Turbulence: Review

Korotkova

Toselli

2021

Applied Sciences

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Theoretical models and results of experimental campaigns relating to non-classic regimes occurring in atmospheric optical turbulence are overviewed. Non-classic turbulence may manifest itself through such phenomena as a varying power law of the refractive-index power spectrum, anisotropy, the presence of constant-temperature gradients and coherent structures. A brief historical introduction to the theories of optical turbulence, both classic and non-classic, is first presented. The effects of non-classic atmospheric turbulence on propagating light beams are then discussed, followed by the summary of results on measuring the non-classic turbulence, on its computer and in-lab simulations and its controlled synthesis. The general theory based on the extended Huygens–Fresnel method, capable of quantifying various effects of non-classic turbulence on propagating optical fields, including the increased light diffraction, beam profile deformations, etc., is then outlined. The review concludes by a summary of optical engineering applications that can be influenced by atmospheric non-classic turbulence, e.g., remote sensing, imaging and wireless optical communication systems. The review makes an accent on the results developed by the authors for the recent AFOSR MURI project on deep turbulence.

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The Combined Effect of Jet and Atmospheric Turbulence on the Propagation of Airborne Partially Coherent Array Beams

et al. 2022

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The exhaust from engines close to the fuselage can cause extreme turbulence and have a significant impact on the performance of airborne laser systems. In this paper, the combined effect of the jet engine and atmospheric turbulence on propagation of a Gaussian Schell-model (GSM) array beam over long distances is studied in detail. Based on the two-step propagation method, the analytical expressions of the cross-spectral density (CSD) function, mean-squared beam width and spectral degree of spatial coherence (DOC) of GSM array beams are derived. It is shown that the jet engine turbulence has a significant effect on the beam broadening even at a very short distance. As the propagation distance in the jet engine turbulence increases, the beam width is less effected by the spatial coherence. Meanwhile, the resistance of lower spatially coherent beam to the turbulence increases as the distance of the jet engine turbulence or the strength of the atmospheric turbulence increases. It is demonstrated that the effect of jet engine turbulence on the beam spreading can be equivalent to moderate or even severe atmospheric turbulence. Moreover, the DOC is a function with oscillatory phenomenon when the propagation distance is short or the strength of turbulence is low.

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Propagation of Gaussian Schell-model beams through a jet engine exhaust

Cited by 17 publications

References 51 publications

Propagation Properties of Gaussian Schell-Model Beam Array in the Jet Engine Exhaust Induced Turbulence

Propagation Properties of Gaussian Schell-Model Beam Array in the Jet Engine Exhaust Induced Turbulence

Non-Classic Atmospheric Optical Turbulence: Review

The Combined Effect of Jet and Atmospheric Turbulence on the Propagation of Airborne Partially Coherent Array Beams

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