Effect of Clear Atmospheric Turbulence on Quality of Free Space Optical Communications in Western Asia

Alkholidi, Abdulsalam; Altowij, Khalil

doi:10.5772/35186

Cited by 22 publications

(19 citation statements)

References 15 publications

(22 reference statements)

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“…Typical terrestrial communication wavelengths such as 808, 1064 or 1550 nm are applicable because they fall within the atmospheric transmission window in the absorption spectrum. As a result, the atmospheric loss due to absorption for these wavelengths turns out to be negligible as noted in [6,7]. However, and due the variation of the atmospheric pressure and temperature, the refractive index undergoes random fluctuations along the transmission path.…”

Section: Introductionmentioning

confidence: 99%

Analysis of dispersion effect on a NRZ-OOK terrestrial free-space optical transmission system

Bouhadda

Abbou

Serhani

et al. 2016

J. Eur. Opt. Soc.-Rapid Publ.

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Background: In this paper, the impact of the dispersion effect, due to atmospheric pressure and temperature, on NRZ-OOK terrestrial free-space optical transmission system is investigated. An expression for the dispersion parameter in FSO atmospheric channel is derived. Results: The results show that the variation of the refractive index along the transmission path induces fluctuations of group velocity dispersion of the optical pulse resulting in broadening of the pulse duration. Simulation results show that at a propagation distance of 7.5 km, the broadening ratio for input pulse duration of 300 fs is approximately 2.39. Further, at a propagation distance of 7.5 km, the remaining fraction of energy is approximately 40 % for a 300 fs input pulse duration. However, by increasing the transmitter input power, the effect of dispersion could be reduced. Namely, for a reference BER of 10 -9 , the maximum distance that it could be achieved is about 1. 461 km for an input power of 1 mW, while it is about 2.694 km for an input power of 4 mW. Conclusions:The results indicate that the effect of dispersion resulting from pressure and temperature increases with the propagation distance, which induces a high BER. However, the results show that it is possible to reach longer propagation distances with a lower BER by increasing the input power.

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Section: Introductionmentioning

confidence: 99%

Analysis of dispersion effect on a NRZ-OOK terrestrial free-space optical transmission system

Bouhadda

Abbou

Serhani

et al. 2016

J. Eur. Opt. Soc.-Rapid Publ.

View full text Add to dashboard Cite

show abstract

“…Absorption happens due to the photons of the beam bumping with haze particles. This phenomenon can reduce the link margin, distance and the availability of the link [8]. Scattering is the dispersion of a radiation beam due to physical interactions.…”

Section: Figmentioning

confidence: 99%

Performance Evaluation of Downlink Design Based on Free Space Optical System

et al. 2017

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Abstract. In this paper, the performance of downlink design utilizing the free space optic (FSO) is presented. The permissible BER of 10 -58 is achieved when the system utilized 40 cm aperture diameter. The highest system sensitivity will lead to less error and enable more transmission output. The result revealed, at a bit rate 155Mbps and effective received power -27.5 dBm, FSO downlink system at bit rate 155 Mbps improved by 13% as compared to 1.5 Gbps and 2.5 Gbps in single transmission line. It is truly shown that, the FSO system utilized 155 Mbp/s with 40 cm aperture diameter shown good performance of a reliable FSO downlink system.

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“…The photon of the beam bouncing with haze particles in the mid-air caused a condition called as the absorption. It caused the link margin, distance and the availability of the link to reduce greatly [1]. Scattering is the scattering of a beam of transmission in a range of directions as an impact of physical interactions.…”

Section: Fig 1 Terrestrial Fso Links [2]mentioning

confidence: 99%

“…The signal transmission is from the transmitter to transfer data received on the other side of the two point communication system. The FSO communication is also called as Optical Wireless Communication, Fibreless, or Laser Communication [1].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the effect of BER and Q-factor on free space optical communication system using diverse wavelength technique

et al. 2017

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Abstract. This paper presents the analysis of the effect of BER and Q-factor on free space optical communication system using the diverse wavelength technique. The visibility is gradually decreased due to attenuation effects such as weather conditions as the bit error rate increases. Despite this disadvantage, FSO performance could be further improved by using a wide range of wavelengths of the laser beam. The results show good performance for 1550 nm wavelength, where the wavelength can accommodate visibility for 6 km at link range of 1 km, and Q-factor 25 at the system performance BER = 10 -124 could improve the system by 67% compared to 850 nm and 785 nm wavelength ,which could enhance the system by only 2%. This clearly show that the superior capabilities of 1550 nm wavelength in handling attenuation problems and capability to reduce the power loss compared to 850 nm and 785 nm wavelength.

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Effect of Clear Atmospheric Turbulence on Quality of Free Space Optical Communications in Western Asia

Cited by 22 publications

References 15 publications

Analysis of dispersion effect on a NRZ-OOK terrestrial free-space optical transmission system

Analysis of dispersion effect on a NRZ-OOK terrestrial free-space optical transmission system

Performance Evaluation of Downlink Design Based on Free Space Optical System

Analysis of the effect of BER and Q-factor on free space optical communication system using diverse wavelength technique

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