Bouhadda, M. and Abbou, F.M. and Serhani, M. and Chaatit, F. and Boutoulout, A. (2016) Analysis of dispersion effect on a NRZ-OOK terrestrial free-space optical transmission system. Journal of the European Optical Society, 12 (1).

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Abstract

Background: In this paper, the impact of the dispersion effect, due to atmospheric pressure and temperature, on NRZ-OOK terrestrial freespace 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 due to pressure and temperature increases with the propagation distance. What 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. © 2016, The Author(s).

Item Type: Article
Uncontrolled Keywords: Atmospheric pressure; Electric power transmission; Group velocity dispersion; Light transmission; Pressure effects; Refractive index, Atmospheric channels; Dispersion parameters; Free-space optical; NRZ-OOK; Pressure and temperature; Propagation distances; Pulse broadening; Transmission paths, Dispersion (waves)
Subjects: Physics and Astronomy
Divisions: SCIENTIFIC PRODUCTION > Physics and Astronomy
Depositing User: Administrateur Eprints Administrateur Eprints
Last Modified: 31 Jan 2020 15:49
URI: http://eprints.umi.ac.ma/id/eprint/4460

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