Directionality of Gaussian Schell-model beams propagating in atmospheric turbulence

Shirai, Tomohiro; Dogariu, Aristide; Wolf, Emil

doi:10.1364/ol.28.000610

Cited by 110 publications

(51 citation statements)

References 5 publications

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“…Therefore the total log intensity due to large-scale and small-scale is (12) 4 Result and discussion Fig. 2 shows the degradation of scintillation index when using the diffuser for strong turbulence.…”

Section: Log Intensitymentioning

confidence: 98%

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Compressing Turbulence Effect in FSO using New Modulation Technique

et al. 2017

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Abstract. Diffusers transmitter modulation to reduce the effect of atmospheric turbulence in free space optical communication system is described in this paper. This technique uses dual transmitters and dual receivers which are using differential mode for detection. The combination of these components produce superior modulation method especially to reduce scintillation index, to overcome signal detection with fix zero threshold and improve power received. In order to improve the performance of free space optical system, these three elements play an important role. The analysis result show that for receiving power dual diffuser modulation at 3 km distance propagation is 4.59dBm compared to conventional OOK using diffuser which only -7.6dBm and equivalent to 3dBm improvement or up to 40 percent better.

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Section: Log Intensitymentioning

confidence: 98%

“…Recently, phase screen diffuser which generates partial coherent beam has rising interest especially to improve the performance in laser communication system [10][11][12][13]. The original FSO employs the perfect coherence beam suffers some problems depends on weather condition.…”

Section: Introductionmentioning

confidence: 99%

Compressing Turbulence Effect in FSO using New Modulation Technique

et al. 2017

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“…(14) in [54] because of a quadratic approximation of Rytov's phase structure function is used; i.e., z 6/5 appears in the second term of Eq. (19) here, while z occurs in [54]. Eq.…”

Section: Mean-squared Beam Width and Angular Spread Of Partially Cohementioning

confidence: 99%

Average Intensity and Spreading of Partially Coherent Standard and Elegant Laguerre-Gaussian Beams in Turbulent Atmosphere

Wang¹,

Cai²,

Eyyuboğlu³

et al. 2010

PIER

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Abstract-Analytical expressions for the average intensity, meansquared beam width and angular spread of partially coherent standard and elegant Laguerre-Gaussian (LG) beams propagating in turbulent atmosphere are derived. The properties of the average intensity, spreading and directionality of partially coherent standard and elegant LG beams in turbulent atmosphere are studied numerically and comparatively. It is found that the beam parameters and structure constant of turbulence together determine the properties of the beams in turbulent atmosphere. Partially coherent standard and elegant LG beams with smaller coherence length, larger beam orders and longer wavelength are less affected by the turbulence. A partially coherent elegant LG beam is less affected by turbulence than a partially coherent standard LG beam under the same condition. Furthermore, it is found that there exist equivalent partially coherent standard and elegant LG beams, equivalent fully coherent standard and elegant LG beams, equivalent Gaussian Schell-model beams that may have the same directionality as a fully coherent Gaussian beam both in free space and in turbulent atmosphere. Our results will be useful in long distance free-space optical communications.

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“…It has been widely recognized that partially coherent laser beams are less affected by turbulence than their coherent counterparts [7,18,24,29,32]. It is also indicated that the use of higher-order model source can also reduce this degradation [3,27,28].…”

Section: Introductionmentioning

confidence: 99%

Average Intensity and Spreading of Partially Coherent Four-Petal Gaussian Beams in Turbulent Atmosphere

Li¹,

Chen²,

Xu³

et al. 2010

PIER B

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Abstract-The concept of partially coherent four-petal Gaussian (PCFPG) beam is introduced and described in analytical forms. Based on the Huygens-Fresnel integral formula, average intensity and beam spreading in turbulent atmosphere are derived in analytical expressions. Effects of beam parameters and atmospheric structure constant on intensity distributions and effective beam sizes are investigated in detail, respectively. Results show that PCFPG beams carrying larger coherence lengths or higher beam orders would be less affected by turbulence. It is also indicated that, when the propagation distance increases, the PCFPG beam would convert into the Gausslike profile sooner or later, but this degradation can be reduced by modulating beam parameters. Results in this paper may provide potential applications in free-space optical communications.

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Directionality of Gaussian Schell-model beams propagating in atmospheric turbulence

Cited by 110 publications

References 5 publications

Compressing Turbulence Effect in FSO using New Modulation Technique

Compressing Turbulence Effect in FSO using New Modulation Technique

Average Intensity and Spreading of Partially Coherent Standard and Elegant Laguerre-Gaussian Beams in Turbulent Atmosphere

Average Intensity and Spreading of Partially Coherent Four-Petal Gaussian Beams in Turbulent Atmosphere

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