Beam propagation analysis of a multi beam FSO system with partially flat-topped laser beams in turbulent atmosphere

Kashani, F.D.; Rad, M. Reza Hedayati; Mahzoun, M. Reza; Ghafary, Bijan

doi:10.1016/j.ijleo.2011.05.036

Cited by 25 publications

(7 citation statements)

References 34 publications

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“…Apart from that and in FSO systems, the impact of turbulence in atmosphere can be alleviated by the technique of laser beams combination. One example of which, is applicable to solve detectors beam scattering and loss of power [27]. Regardless of atmospheric losses [28] the functionality of multi-beam FSO system was evaluated in terms of geometrical losses, link margin and received power [29].…”

Section: B) Classes Of Fso Systemsmentioning

confidence: 99%

A Survey of Free Space Optics (FSO) Communication Systems, Links, and Networks

et al. 2021

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Section: B) Classes Of Fso Systemsmentioning

confidence: 99%

A Survey of Free Space Optics (FSO) Communication Systems, Links, and Networks

et al. 2021

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“…Moreover, finding a good solution to overcome the destructive effects of turbulence and consequently increase in quality of the communication link parameters in FSO systems is an engaging topic that has attracted theoretical and experimental researchers' attentions [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Laser Physicsmentioning

confidence: 99%

“…Lots of papers, which are introduced and explained above related to the atmosphere, are limited to the case of the ideal atmospheric turbulence such as the Kolmogorov model [1,5,6,8,9,14,15,21,22].…”

Section: Laser Physicsmentioning

confidence: 99%

Scintillation and BER analysis of the partially coherent flat-topped array laser beam in the non-Kolmogorov atmospheric turbulence on slant path

Golmohammady¹,

Yousefi²,

Mashal³

et al. 2019

Laser Phys.

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Using the extended Huygens-Fresnel principle in this paper, a semi analytical expression for describing the on-axis scintillation index of a partially coherent flat-topped array laser beam through slant path of non-Kolmogorov atmospheric turbulence is derived; consequently, with the help of the log-normal intensity probability density function, the bit error rate (BER) is evaluated. The main aims of this paper are exploring the effects of source factors (such as wavelength, order of flatness, and beam width) and the non-Kolmogorov turbulent atmosphere parameters (such as Kolmogorov inner scale, general spectral power-law exponent, the turbulence structure constant) on propagation behaviour of scintillation index, and, hence, on BER. Results indicate that, when the average SNR increases, BER is more affected while the power-law exponent increases. Consequently, it can be deduced that the mean bit error rate increases while the power-law exponent decreases. In addition, the scintillation index and BER as communication link parameters represent the fact that increasing the atmospheric refractive-index structure parameter on the ground and decreasing the inner scale of turbulence eddies, which expresses the conditions of strong turbulence, causes an increase in theses link parameters.

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“…A broadband system FSO sends a modified beam of perceptible or infrared-light over the sky S. Kaur [3]. In wireless systems, FSO has the potential for improvements and optimization in channel usability and economics [4][5][6]. The notion of FSO, or modulated light information, is not a new technology; it has been studied for a long time but has yet to be put into practice due to the limits of the electronic devices available at the time [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…In wireless systems, FSO has the potential for improvements and optimization in channel usability and economics [4][5][6]. The notion of FSO, or modulated light information, is not a new technology; it has been studied for a long time but has yet to be put into practice due to the limits of the electronic devices available at the time [6,7]. Several issues have hampered the performance of the (FSO) system, the most significant of which being atmospheric attenuation.…”

Section: Introductionmentioning

confidence: 99%

Improved performance of hybrid optical communications system

Naji

2021

QJES

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Frees Space Optical (FSO) system employs empty space to transfer information between the transmitter and receiver using light. The single-beam Single Input Single Output (SISO) technology is well known for being subject to air attenuation induced by weather conditions, which decreases the performance link range and data quality. The proposed system in this research is a combination of DWDM and MIMO approaches to address this issue. The research is based on Optisystem simulations with various weather reduction in many of FSO systems: the FSO-DWDM-SISO (FDS) scheme and the suggested FSO-Hybrid-DWDM-MIMO method (FHDM). FHDM technology has considerably enhanced connection distance, received power, scalability, and data speed. At a data rate of 500 Mb/s, an evaluation is made between the suggested method and the FDS with respect to quality-factor during varied weather reduction using different numbers of optical transmission beams. The results show that the FHDM system improves connection distance, received optical power, minimum bit error rate (BER), and highest quality-factor significantly during various weather conditions.

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Beam propagation analysis of a multi beam FSO system with partially flat-topped laser beams in turbulent atmosphere

Cited by 25 publications

References 34 publications

A Survey of Free Space Optics (FSO) Communication Systems, Links, and Networks

A Survey of Free Space Optics (FSO) Communication Systems, Links, and Networks

Scintillation and BER analysis of the partially coherent flat-topped array laser beam in the non-Kolmogorov atmospheric turbulence on slant path

Improved performance of hybrid optical communications system

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