Suppression of Turbulence-Induced Scintillation in Free-Space Optical Communication Systems Using Saturated Optical Amplifiers

Abtahi, Mohammad‐Ali; Lemieux, P.; Mathlouthi, W.; Rusch, Leslie A.

doi:10.1109/jlt.2006.884561

Cited by 93 publications

(46 citation statements)

References 18 publications

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“…Wind velocity is always variable, which transfers heat and water vapors in the form of eddies. Temperature changes in the atmosphere caused by these eddies lead to heating up of air pockets called Fresnel zones having different temperatures and different densities, which lead to refractive index differences [5]. Turbulences are random, which means that these pockets are continuously being created and destroyed.…”

Section: Scintillation Effectmentioning

confidence: 99%

“…Light beam carrying the information travels through air and is encumbered by the atmospheric effects, like rain, fog, snow, haze, and the atmospheric turbulences due to temperature and pressure fluctuations in the atmosphere [4]. Absorption, scattering and scintillation of light are consequences of turbulent atmospheric conditions [5]. Line of sight (LOS) is an imperative requirement in FSO communication, but sometimes physical objects like birds or poles temporarily obstruct it, making the link unachievable.…”

Section: Introductionmentioning

confidence: 99%

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Mitigation of Scintillation Effects in WDM FSO System using Multibeam Technique

Grover¹,

Singh²,

Kaur³

2017

JTIT

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Abstract-Free Space Optical communication (FSO) has engrossed a large section of researchers in recent times due to its wide bandwidth, effortless deployment and immune links making it appropriate for communication purposes. This wireless optical technique requires clear and non-turbulent atmospheric conditions for efficient transmission. In this paper, authors aim at reducing the effect of turbulent atmospheric conditions like scintillation effect on FSO. Multibeam technique, which uses spatially diverse transmitters for transmission, has been used for increasing the achievable link distance of the FSO system. Parameters like quality factor and bit error rate have been used to check the received signal quality.

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Section: Scintillation Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mitigation of Scintillation Effects in WDM FSO System using Multibeam Technique

Grover¹,

Singh²,

Kaur³

2017

JTIT

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“…Recently free-space optical (FSO) communication has attracted more and more attention as it becomes widely used among the telecommunication community for both ground-and space-based wireless links and "last-mile" applications [1], due to its unregulated spectrum, high potential bandwidth, relatively low power requirement, low bit error rate, and ease of redeployment. However, phase disturbances from atmospheric turbulence along propagation paths, manifesting as intensity fluctuation (scintillation), beam wandering, and beam broadening at the receiver all lead to significant decrease of coupling efficiency [2], which seriously influences the stability and reliability of FSO communication systems [3].…”

Section: Introductionmentioning

confidence: 99%

Model-Based Tabu Search Algorithm for Free-Space Optical Communication with a Novel Parallel Wavefront Correction System

Zhao

Cao

et al. 2015

Journal of the Optical Society of Korea

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In this study, a novel parallel wavefront correction system architecture is proposed, and a model-based tabu search (MBTS) algorithm is introduced for this new system to compensate wavefront aberration caused by atmospheric turbulence in a free-space optical (FSO) communication system. The algorithm flowchart is presented, and a simple hypothetical design for the parallel correction system with multiple adaptive optical (AO) subsystems is given. The simulated performance of MBTS for an AO-FSO system is analyzed. The results indicate that the proposed algorithm offers better performance in wavefront aberration compensation, coupling efficiency, and convergence speed than a stochastic parallel gradient descent (SPGD) algorithm.

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“…Multiple beam waves transmission and multiple beam receiver or MIMO has been reported could enhanced the performance FSOC system at signifficant value [3]. Saturated EDFA at transmitter beacon has been reported successfully overcoming high turbulence [4]. In order to shrink wide distribution of scintillation, the spatial diversity has been reported to mitigate high scale of turbulence successfully [5][6].…”

Section: Introductionmentioning

confidence: 99%

Performances of Free-Space Optical Communication System Over Strong Turbulence

Darusalam¹,

Priambodo²,

Sudibyo³

et al. 2014

MST

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We report an experimental of free-space optical communication (FSOC) system that use tube propagation simulator (TPS) as the turbulence medium. The FSOC system use wavelength of 1550 nm at the rate transmission of 1000 Mbps and amplified with EDFA at the output of +23 dBm. Index structure of 10 -15 -10 -13 as the representation of atmosphere index turbulences are used for simulation of intensity distribution model or scintillation. The simulation use gammagamma and K model as well. The beam wave propagation models used in simulation are plane wave, spherical wave and Gaussian wave. Spherical wave achieves highest performance via gamma-gamma in strong turbulence. While Gaussian wave achieves highest performance also via K model. We also found, characteristical FSOC system performance is calculated more accurately with gamma-gamma method for strong turbulence than K model. The performances from gamma-gamma for strong turbulence are at 22.55 dB, at 5.33×10 -4 , and at 9.41 ×10 -6 . AbstrakPerformansi Sistem Komunikasi Optik Media Atmosfir (Free-Space Optical Communication) dalam Kondisi Turbulensi Kuat. Kami melaporkan eksperimen sistem komunikasi optik media atmosfir (FSOC) menggunakan tube propagation simulator (TPS) sebagai kanal media turbulen. Sistem FSOC menggunakan panjang gelombang 1550 nm pada tingkat transmisi 1000 Mbps dan penguatan sinyal dengan EDFA pada luaran +23 dBm. Struktur indeks atmosfir pada kisaran 10 -15 -10 -13 digunakan sebagai parameter skala turbulensi untuk menghitung distribusi model intensitas atau sintilasi. Simulasi perhitungan menggunakan model statitistik gamma-gamma dan K. Model propagasi gelombang yang digunakan dalam simulasi adalah gelombang datar (plane wave), gelombang sirkular (spherical wave), gelombang Gaussian (Gaussian wave). Gelombang sirkular menghasilkan performansi tertinggi menggunakan model gammagamma pada turbulensi kuat. Sedangkan gelombang Gaussian menghasilkan performansi tertinggi menggunakan model K. Kami juga menemukan bahwa karakteristik performansi sistem FSOC dapat terukur lebih akurat menggunakan metode gamma-gamma untuk turbulensi kuat daripada model K. Hal tersebut mengacu pada hasil simulasi dan eksperimen. Hasil tersebut adalah dalam kondisi turbulensi kuat performansi berada pada rentang 22,55 dB, dalam rentang 5,33×10 -4 , dan pada rentang 9,41×10 -6 .

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Suppression of Turbulence-Induced Scintillation in Free-Space Optical Communication Systems Using Saturated Optical Amplifiers

Cited by 93 publications

References 18 publications

Mitigation of Scintillation Effects in WDM FSO System using Multibeam Technique

Mitigation of Scintillation Effects in WDM FSO System using Multibeam Technique

Model-Based Tabu Search Algorithm for Free-Space Optical Communication with a Novel Parallel Wavefront Correction System

Performances of Free-Space Optical Communication System Over Strong Turbulence

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