Signal current probability distribution for optical heterodyne receivers in the turbulent atmosphere 2: Experiment

Churnside, James H.; McIntyre, C. M.

doi:10.1364/ao.17.002148

Cited by 9 publications

(5 citation statements)

References 8 publications

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“…Note, however, that by considering the phase as a continuous Gaussian field, phase dislocations, which may occur under strong fluctuations [15], are not taken into account. Without scintillation ͑A ϭ 1͒, i is equal to i defined by i ϵ ͯ ͵W͑r͒exp͓j͑r͔͒dr ͯ , (6) and included between 0 and 1. The mean square equals [3]:…”

Section: A Mean Signal-to-noise Ratiomentioning

confidence: 99%

“…The investigation of the heterodyne signal distribution started more than three decades ago. Churnside and McIntyre derived analytically an approximate distri-bution for a limited range of the receiving aperture size [5,6]. The analytical derivation of the coherentsignal distribution is difficult, even when the statistics of the optical field are known.…”

Section: Introductionmentioning

confidence: 99%

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Turbulence-induced fading probability in coherent optical communication through the atmosphere

Perlot

2007

Appl. Opt.

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To assess the coherent detection of an optical signal perturbed by atmospheric turbulence, the loss in the mean signal-to-noise ratio (SNR) is usually invoked although it constitutes a limited description of the signal fluctuations. To produce statistical distributions of the SNR, we generate random optical fields. A 5/3-power law for the phase structure function is considered. The benefit of a wavefront tilt correction is assessed. Based on the 1%-probability fade, an optimum receiver size is found. For phase fluctuations only, a similarity between the signal distribution and the beta distribution is observed. Phase and amplitude are assumed independent, and the influence of amplitude perturbations is assessed with a scintillation index of 2. Turbulence impairments are compared for a coherent receiver and a direct-detection receiver.

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Section: A Mean Signal-to-noise Ratiomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Turbulence-induced fading probability in coherent optical communication through the atmosphere

Perlot

2007

Appl. Opt.

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“…Since in a well-designed heterodyne detection system the local oscillator power is considerably larger than the received signal power,' 5 Eq. (5) can be written as…”

Section: Ill Turbulence and Optical Heterodyne Detectionmentioning

confidence: 99%

“…The angle-tracked phase structure function, D T (6), is needed to perform this task. D T (5) was first calculated (approximately) by Fried, and he obtained the following result1 4 : 6.88(QM/ro) [1 -(IS/d) 13 ]. 38Fried's calculation assumed that the phase of the tilt corrected wave front and the tilt component itself were uncorrelated.…”

Section: A Downlinkmentioning

confidence: 99%

Atmospheric turbulence-induced signal fades on optical heterodyne communication links

Winick

1986

Appl. Opt.

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The three basic atmospheric propagation effects, absorption, scattering, and turbulence, are reviewed. A simulation approach is then developed to determine signal fade probability distributions on heterodynedetected satellite links which operate through naturally occurring atmospheric turbulence. The calculations are performed on both angle-tracked and nonangle-tracked downlinks, and on uplinks, with and without adaptive optics. Turbulence-induced degradations in communication performance are determined using signal fade probability distributions, and it is shown that the average signal fade can be a poor measure of the performance degradation.

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“…Current applications of atmospheric optical telecommunications are mostly in the access networks where direct detection is used. As an alternative to direct detection, optical heterodyne detection performance in turbulence has been scrutinized in the past [15][16][17][18][19][20]. Heterodyne detection can have some advantages over direct detection, for example in the tuning of the received signal.…”

Section: Introductionmentioning

confidence: 99%

Sinusoidal Gaussian beam field correlations

Baykal¹

2012

J. Opt.

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Field correlations of sinusoidal Gaussian beams are formulated in turbulence, and specifically cos Gaussian (cG) and cosh Gaussian (chG) beam field correlations are evaluated versus the diagonal length at the receiver plane. The effects of the displacement parameters, the coordinates of the first receiver point and the source sizes on the field correlations of monochromatic light sources having cG and chG field distributions are investigated when such beams traverse turbulent media. Such parameters affect spatial heterodyne measurement. Field correlations found at the receiver plane reflect the combined variations of diffraction patterns and turbulence effects. To differentiate the diffraction patterns and the turbulence effects, field correlations of cG and chG beams in turbulence and in the absence of turbulence are compared. For cG beams, the oscillatory behaviour of the field correlations versus the diagonal length at the receiver plane in the absence of turbulence becomes smoother in the presence of turbulence. The received fields of cG and chG beams become decorrelated at shorter diagonal distances in turbulence.

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Signal current probability distribution for optical heterodyne receivers in the turbulent atmosphere 2: Experiment

Cited by 9 publications

References 8 publications

Turbulence-induced fading probability in coherent optical communication through the atmosphere

Turbulence-induced fading probability in coherent optical communication through the atmosphere

Atmospheric turbulence-induced signal fades on optical heterodyne communication links

Sinusoidal Gaussian beam field correlations

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