Characteristics of high-power partially coherent laser beams propagating upwards in the turbulent atmosphere

Deng, Yu; Wang, Huan; Ji, Xiaoling; Li, Xiaoqing; Yu, Hong; Chen, Lifeng

doi:10.1364/oe.399401

Cited by 18 publications

(8 citation statements)

References 23 publications

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“…In recent years, major research efforts have been devoted to the theoretical study of propagation of special beams in atmospheric turbulence, including vortex laser beam, vortex cosine hyperbolic Gaussian beam, airy prime beam, lowest order Bessel Gaussian beams, high power partially coherent laser beams, low order Laguerre-Gaussian beams, Bessel-Gaussian-Schell model beam, vortex Bessel-like beams, optical bottle beam, radial phased-locked rotating elliptical Gaussian beam array, airy Gaussian vortex beam array, flat-topped Gaussian vortex beam, generalized Bessel-Laguerre-Gaussian beams, and so on. Furthermore, the atmospheric turbulent effects involve mean intensity, scintillation, coherence, beam spreading, wander, and other propagation properties [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47].…”

Section: Theoretical Studies Of Kolmogorov Turbulent Effectmentioning

confidence: 99%

A Survey of Structure of Atmospheric Turbulence in Atmosphere and Related Turbulent Effects

Fa-zhi¹,

Du²,

Yuan³

et al. 2021

Atmosphere

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The Earth’s atmosphere is the living environment in which we live and cannot escape. Atmospheric turbulence is a typical random inhomogeneous medium, which causes random fluctuations of both the amplitude and phase of optical wave propagating through it. Currently, it is widely accepted that there exists two kinds of turbulence in the aerosphere: one is Kolmogorov turbulence, and the other is non-Kolmogorov turbulence, which have been confirmed by both increasing experimental evidence and theoretical investigations. The results of atmospheric measurements have shown that the structure of atmospheric turbulence in the Earth’s atmosphere is composed of Kolmogorov turbulence at lower levels and non-Kolmogorov turbulence at higher levels. Since the time of Newton, people began to study optical wave propagation in atmospheric turbulence. In the early stage, optical wave propagation in Kolmogorov atmospheric turbulence was mainly studied and then optical wave propagation in non-Kolmogorov atmospheric turbulence was also studied. After more than half a century of efforts, the study of optical wave propagation in atmospheric turbulence has made great progress, and the theoretical results are also used to guide practical applications. On this basis, we summarize the development status and latest progress of propagation theory in atmospheric turbulence, mainly including propagation theory in conventional Kolmogorov turbulence and one in non-Kolmogorov atmospheric turbulence. In addition, the combined influence of Kolmogorov and non-Kolmogorov turbulence in Earth’s atmosphere on optical wave propagation is also summarized. This timely summary is very necessary and is of great significance for various applications and development in the aerospace field, where the Earth’s atmosphere is one part of many links.

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Section: Theoretical Studies Of Kolmogorov Turbulent Effectmentioning

confidence: 99%

A Survey of Structure of Atmospheric Turbulence in Atmosphere and Related Turbulent Effects

Fa-zhi¹,

Du²,

Yuan³

et al. 2021

Atmosphere

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“…For numerous low-earth-orbit (LEO) debris with cm scales, the ground-based laser space-debris removal may play an important role [1][2][3][4][5]. The beam quality on the target is significantly affected by the physical features of high-power laser beams propagating through the inhomogeneous atmosphere [6][7][8][9][10][11][12]. The nonlinear self-focusing effect is one of the main physical features because the beam power is well above the self-focusing critical power in the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Effect of Self-Focusing on Propagation of a Laser Beam in the Atmosphere Along a Slant Path

2023

IEEE Photonics J.

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The equivalent B-integral phase screen (EBPS) method of numerical simulation is proposed to study the propagation of a high-power laser beam in the atmosphere along a slant path, and the computational accuracy and efficiency of the EBPS method are confirmed. It is shown that a decrease of the selffocusing caused by the atmosphere refraction effect. However, the refraction correction for the elevation angle is hardly affected by the self-focusing effect. On the other hand, the analytical expressions of the B integral and the optimal initial beam power of a high-power laser beam propagating in the atmosphere along a slant path are derived. It is found that the optimal beam power and the target maximum intensity decrease as the apparent elevation angle decreases, while the optimal beam power decreases but the target maximum intensity increases as the wavelength decreases. A method to optimize the beam quality on the target is presented.

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“…[8,9] Up to now, the propagation properties, such as the intensity distribution, scintillation index, beam spreading, spectral coherent degree of laser beams propagating through atmospheric turbulence have been studied widely. [10][11][12][13][14] That is to say, as the airborne laser beams propagates in the turbulent atmosphere, the combined effect of jet and atmospheric turbulence has a significant impact on the beam quality of laser beams.…”

Section: Introductionmentioning

confidence: 99%

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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Characteristics of high-power partially coherent laser beams propagating upwards in the turbulent atmosphere

Cited by 18 publications

References 23 publications

A Survey of Structure of Atmospheric Turbulence in Atmosphere and Related Turbulent Effects

A Survey of Structure of Atmospheric Turbulence in Atmosphere and Related Turbulent Effects

Effect of Self-Focusing on Propagation of a Laser Beam in the Atmosphere Along a Slant Path

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

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