Scintillation reduction in pseudo Multi-Gaussian Schell Model beams in the maritime environment

Nelson, Charles; Avramov-Zamurovic, Svetlana; Korotkova, Olga; Guth, S.; Malek‐Madani, Reza

doi:10.1016/j.optcom.2015.11.049

Cited by 18 publications

(9 citation statements)

References 17 publications

(14 reference statements)

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“…It is known that Gaussian-Schell model (GSM) for the beams is widely employed to study the propagation of partially coherent light [10][11][12]. Below we will restrict our analysis to a simple one-dimensional linear array.…”

Section: Analytical Formulae For Partially Coherent Gaussian Array Bementioning

confidence: 99%

Influence of atmosphere turbulence and laser coherence on the identification method based on interference multiple-beam scanning of optical targets

Zhao¹,

He²,

Shan³

et al. 2017

Ukr. J. Phys. Opt.

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Abstract. Using an extended Huygens-Fresnel diffraction integral, we have derived analytical formulae that describe a partially coherent array of Gaussian beams passing through an optical target and going back along the entrance way in a turbulent atmosphere. These formulae include the light intensity distribution at the return place, as well as the light intensity distribution and the spatial correlation at the target place. Using numerical calculations, we have studied the effects of laser coherence length and turbulence strength on the interference fringe contrast and the spatial coherence degree at the target place, together with the light intensity distribution at the return place and the system operating range. We have found that the fringe contrast and the spatial coherence degree at the target place decrease with increasing turbulence strength and decreasing laser coherence length. Then the contrast of light intensity distribution at the return place decreases and the difficulties of identification of optical targets grow. The operating range can be as large as hundred kilometres under a weak-turbulence condition, decreasing rapidly to a kilometre level at strong turbulence.

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Section: Analytical Formulae For Partially Coherent Gaussian Array Bementioning

confidence: 99%

Influence of atmosphere turbulence and laser coherence on the identification method based on interference multiple-beam scanning of optical targets

Zhao¹,

He²,

Shan³

et al. 2017

Ukr. J. Phys. Opt.

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“…In this paper we consider the scintillation problem when the source is partially coherent in time and space and the medium has time and space random fluctuations. Partially coherent sources have indeed been promoted for reducing scintillation at a receiving end in the context of laser propagation [29,2,35,26]. Most of these studies rely on physical experiments or numerics and Monte Carlo simulations to evaluate the scintillation index.…”

Section: Introductionmentioning

confidence: 99%

“…In Section 4 we give the main results which characterize the scintillation index in various scaling regimes. In Section 5 we present an example involving data presented in [29]. Technical calculations associated with the fourth-order moment equations are presented in the appendices.…”

Section: Introductionmentioning

confidence: 99%

Scintillation of Partially Coherent Light in Time Varying Complex Media

Garnier,

Solna

2022

Preprint

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We present a theory for wave scintillation in the situation with a timedependent partially coherent source and a time-dependent randomly heterogeneous medium. Our objective is to understand how the scintillation index of the measured intensity depends on the source and medium parameters. We deduce from an asymptotic analysis of the random wave equation a general form of the scintillation index and we evaluate this in various scaling regimes. The scintillation index is a fundamental quantity that is used to analyze and optimize imaging and communication schemes. Our results are useful to quantify the scintillation index under realistic propagation scenarios and to address such optimization challenges.

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“…Their widespread appeal stems from the fact that, by simply manipulating spatial coherence, the source's resulting shape and polarization can be precisely controlled. Numerous researchers have designed vector partially coherent sources for applications such as free-space and underwater optical communications [7][8][9][10][11][12][13][14][15][16], remote sensing [17,18], optical scattering [19][20][21][22][23][24][25][26][27][28][29], and particle manipulation and trapping [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Generation of Vector Partially Coherent Optical Sources Using Phase-Only Spatial Light Modulators

et al. 2016

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A simple and flexible optical system for generating electromagnetic or vector partially coherent sources or beams is presented. The alternative design controls field amplitude (beam shape), coherence, and polarization using only spatial light modulators. This improvement makes the apparatus simpler to construct and significantly increases the flexibility of vector partially coherent source generators by allowing many different types of sources to be produced without changing the physical setup. The system's layout and theoretical foundations are thoroughly discussed. The utility and flexibility of the proposed system are demonstrated by producing a vector Schell-model and non-Schell-model source. The experimental results are compared to theoretical predictions to validate the design. Lastly, design aspects, which must be considered when building a vector partially coherent source generator for a specific application, are discussed.

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Scintillation reduction in pseudo Multi-Gaussian Schell Model beams in the maritime environment

Cited by 18 publications

References 17 publications

Influence of atmosphere turbulence and laser coherence on the identification method based on interference multiple-beam scanning of optical targets

Influence of atmosphere turbulence and laser coherence on the identification method based on interference multiple-beam scanning of optical targets

Scintillation of Partially Coherent Light in Time Varying Complex Media

Generation of Vector Partially Coherent Optical Sources Using Phase-Only Spatial Light Modulators

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