Light scintillation in oceanic turbulence

Korotkova, Olga; Farwell, Nathan; Shchepakina, Elena

doi:10.1080/17455030.2012.656731

Cited by 237 publications

(109 citation statements)

References 10 publications

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“…More specifically, values of σ 2 R ≪ 1 correspond to weak fluctuations, whereas σ 2 R ≫1 indicates a strong turbulence regime. In contrast to atmospheric studies, strong oceanic turbulence appears at distances shorter than 100m [32].…”

Section: Oceanic Turbulencementioning

confidence: 84%

“…As shown in Ref. [32], when a Gaussian beam propagates through weak turbulence and without taking into consideration the scattering phenomenon, the scintillation index is expressed as the sum of two components…”

Section: Oceanic Turbulencementioning

confidence: 99%

“…The function Φ n ðκÞ is the power spectrum of turbulence and for homogeneous and isotropic oceanic waters takes the form [32] A S ¼ 1:9 · 10 À4 ,a n dA TS ¼ 9:41 · 10 À3 . The unitless variable w is the relative strength of the fluctuations caused by either temperature or salinity.…”

Section: Oceanic Turbulencementioning

confidence: 99%

See 2 more Smart Citations

Underwater Optical Wireless Communication Systems: A Concise Review

Gkoura¹,

Roumelas²,

Nistazakis³

et al. 2017

Turbulence Modelling Approaches - Current State, Development Prospects, Applications

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Underwater optical wireless communications (UOWC) have gained a considerable interest during the last years as an alternative means for broadband inexpensive submarine communications. UOWC present numerous similarities compared to free space optical (FSO) communications or laser satellite links mainly due to the fact that they employ optical wavelengths to transfer secure information between dedicated point-to-point links. By using suitable wavelengths, high data rates can be attained. Some recent works showed that broadband links can be achieved over moderate ranges. Transmissions of several Mbps have been realized in laboratory experiments by employing a simulated aquatic medium with scattering characteristics similar to oceanic waters. It was also demonstrated that UOWC networks are feasible to operate at high data rates for medium distances up to a hundred meters. However, it is not currently available as an industrial product and mainly test-bed measurements in water test tanks have been reported so far. Therefore, extensive research is expected in the near future, which is necessary in order to further reveal the "hidden" abilities of optical spectrum to transfer broadband signals at higher distances. The present work summarizes the recent advances in channel modeling and system analysis and design in the area of UOWC.

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Section: Oceanic Turbulencementioning

confidence: 84%

Section: Oceanic Turbulencementioning

confidence: 99%

See 1 more Smart Citation

Underwater Optical Wireless Communication Systems: A Concise Review

Gkoura¹,

Roumelas²,

Nistazakis³

et al. 2017

Turbulence Modelling Approaches - Current State, Development Prospects, Applications

View full text Add to dashboard Cite

show abstract

“…Recently, it is much convenient to research homogeneous and isotropic water based on the power spectrum of oceanic turbulence [1]. Dr. Korotkova has studied the intensity and coherence properties of light, the effect of polarization characteristics and numerically researched light scintillation in oceanic turbulence, respectively [2][3][4]. Scintillations of optical plane and spherical waves in underwater turbulence have been published [5].…”

Section: Introductionmentioning

confidence: 99%

Influence of oceanic turbulence on propagation of a radial Gaussian beam array

Lu¹,

Zhang²,

Fan³

et al. 2015

Opt. Express

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The analytical expression for the root-mean-square (Rms) beam width of the radial Gaussian beam array propagating in oceanic turbulence is derived, where the coherent combination is considered. Meanwhile, the analytical expression for effect of the turbulence on the beam F is also obtained. Giving a comparison of results of F calculated by the analytical expression and the previously integrating one, it can be seen that the two results are in agreement with each other exactly. Further, the influences of the rate of dissipation of mean-squared temperatureχ(T), the rate of dissipation of kinetic energy per unit mass of seawater εand the ratio of temperature to salinity contribution to the refractive index spectrum w are investigated. The results indicate that the Rms beam width increases as χ(T) increases, εdecreases and the salinity-induced turbulence dominates. Moreover, the changings of effective radius of curvature with mentioned above parameters are studied. The strength of turbulence determines the value of effective radius of curvature, and which decreases asχ(T) and w increases, and εdecreases.

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“…The propagation of various kind of laser beams used in wireless optical links in underwater channels will cause intensity fluctuations, also affect the performance of optical communication link (Kumar et al, 2011;Lu et al, 2006;Korotkova et al, 2012;Baykal, 2015;Yousefi et al, 2015;Yi et al, 2015;Gökçe et al, 2016;Baykal, 2016;Cheng et al, 2016;Peng et al, 2017;Nikishov and Nikishov, 2000;Gerçekcioglu, 2014;Ata and Baykal, 2014). Especially, the scintillation indices of optical plane and spherical and Gaussian beams propagating in underwater turbulent media are researched by using the Rytov method (Gerçekcioglu, 2014;Ata and Baykal, 2014).…”

Section: Introductionmentioning

confidence: 99%

Ber of Annular Beams in Weak Oceanic Turbulence

Gerçekcioğlu

2017

Scitech

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Based on Rytov method, on-axis scintillation index of laser communication link in a weak oceanic medium is formulated for collimated annular beam. Employing these obtained scintillation values, average bit error rate () is evaluated where the intensity has log-normal distribution.Scintillation indices of collimated annular beams are found for fixed primary source size w için bulunur. Paralelleştirilmiş halka hüzmesi için kayanak büyüklüğü ve ortalama sinyal gürültü oranı ()' na göre , birim kütle akışkanı ve kaynak boyutları için türbülans kinetik enerjinin çeşitli dağılım oranı için sergilenmektedir. Belirtilen iletişim bağlantısında, halkasal hüzmelerin ikincil kaynak boyutu sıfıra eşit olduğunda, yani Gaussian hüzmesi olduğunda, daha fazla avantaj sağlayacaktır.

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Light scintillation in oceanic turbulence

Cited by 237 publications

References 10 publications

Underwater Optical Wireless Communication Systems: A Concise Review

Underwater Optical Wireless Communication Systems: A Concise Review

Influence of oceanic turbulence on propagation of a radial Gaussian beam array

Ber of Annular Beams in Weak Oceanic Turbulence

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