Characterization of fog-induced attenuation for optimizing optical propagation links in Nigeria

Ojo, J. S.; Olaitan, J.A.; Ojo, O. L.

doi:10.1016/j.rio.2022.100279

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…We use a broad-spectrum halogen light to measure the transmittance over the length of the chamber and then calculate the visibility index using V = −10 log 10 (T th )/γ λ . Standard visibility levels for different weather conditions can be found in [25]. Measurements are taken at regular intervals (after every 0.1 s) to ensure a comprehensive dataset.…”

Section: Methodsmentioning

confidence: 99%

Optical Signal Attenuation through Smog in Controlled Laboratory Conditions

Khalid,

Sajid,

Cheema

et al. 2024

Photonics

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Free-space optical (FSO) communication is a line-of-sight (LOS) communication technology that uses light, typically lasers, to transmit data through the atmosphere. FSO can provide high data transfer rates, but factors like weather conditions can affect its performance. Like fog, smog also degrades the availability and reliability of FSO links, as the particulate matter (PM) present in smog scatters the light beam, causing perceptible attenuation. In this paper, we have investigated the attenuation of an optical signal under laboratory-controlled smog conditions, using both theoretical and experimental approaches. A 6 m long acrylic chamber is used to contain artificial smog and measure the optical attenuation through it. The experimental result shows that smog attenuation is approximately 1.705 times more than fog attenuation. The findings of this study offer valuable insights into the effects of smog on optical links and can contribute to the development and optimization of these systems in regions with high levels of smog.

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Section: Methodsmentioning

confidence: 99%

Optical Signal Attenuation through Smog in Controlled Laboratory Conditions

Khalid,

Sajid,

Cheema

et al. 2024

Photonics

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“…For visibility data less than 1 km, the Ijaz model was used to determine scattering losses, whereas the Kim model was utilized for visibility measures greater than or equal to 1 km. Transmission wavelengths of 850 nm and 1550 nm were utilized to determine scattering losses with the two models, and it is shown that 1550 nm wavelength, among the two wavelengths considered has the minimum scattering attenuation [21], since attenuation decreases as visibility increases. Before establishing an FSO system, it is essential to comprehend the weather limitations that will be encountered in a certain location and at a given time.…”

Section: Scattering Attenuationmentioning

confidence: 99%

Impacts of Aerosol Scattering Attenuation on Free-Space Optical Communication in Owerri, Nigeria

Ayo-Akanbi,

Akinwumi,

Omotosho

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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In spite of the several benefits of using free-space optical (FSO) communication systems as complementary platforms for next-generation networks, the existence of atmospheric disturbances such fog and scintillations are key sources of signal impairment that affect system performance. Thus, it is crucial to learn about the specific weather patterns of the areas where FSO lines will be installed. The purpose of this work is to estimate the availability performance of FSO lines broadcasting at both 850 nm and 1550 nm by performing a statistical analysis of meteorological visibility data gathered for Owerri in Nigeria over a 21-year period (2000-2021). The results shows that the visibility during the most common fog events in Owerri is 100 meters. The probabilities of encountering and exceeding the scattering attenuations associated with Owerri’s most common fog event are 0.0002 and 0.0229, respectively. This research could be expanded in the future by exploring the effects of varying localized climatic conditions on the many forms of optical signals, such as plane, spherical, and Gaussian beam waves.

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Characterization of fog-induced attenuation for optimizing optical propagation links in Nigeria

Cited by 2 publications

References 12 publications

Optical Signal Attenuation through Smog in Controlled Laboratory Conditions

Optical Signal Attenuation through Smog in Controlled Laboratory Conditions

Impacts of Aerosol Scattering Attenuation on Free-Space Optical Communication in Owerri, Nigeria

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