Compensating for Optical Beam Scattering and Wandering in FSO Communications

Hulea, Mircea; Ghassemlooy, Zabih; Rajbhandari, Sujan; Tang, Xuan

doi:10.1109/jlt.2014.2304182

Cited by 63 publications

(20 citation statements)

References 16 publications

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“…Due to turbulence eddies the propagating optical beam experiences amplitude and phase fluctuations, and loss of spatial coherence, which can ultimately result in optical power dropping below the Rx threshold level, thus leading to performance deterioration or even a total link failure [29]- [31]. For turbulence induced irradiance fluctuations several statistical models have been proposed [2], [32].…”

Section: A Turbulence Modelmentioning

confidence: 99%

Experimental Investigation of All-Optical Relay-Assisted 10 Gb/s FSO Link Over the Atmospheric Turbulence Channel

Nor

Ghassemlooy

Bohata

et al. 2017

J. Lightwave Technol.

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Section: A Turbulence Modelmentioning

confidence: 99%

Experimental Investigation of All-Optical Relay-Assisted 10 Gb/s FSO Link Over the Atmospheric Turbulence Channel

Nor

Ghassemlooy

Bohata

et al. 2017

J. Lightwave Technol.

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“…The system was analyzed under four conditions: (a) with no turbulence (b) with turbulence -with one of the fan heater located at the transmitter, (c) with turbulence -with a fan heater located at the receiver, and (d) with turbulence -with fans positioned at transmitter and receiver. Based on the recorded data the Q-factor and the scintillation index of the received signals were calculated using the following expression [23]:…”

Section: Resultsmentioning

confidence: 99%

“…The aperture averaging using a concentrator lens is widely adopted in FSO systems due to wide avalibility of lens in various shapes and sizes. Alternatively a spherical concave mirror (SCM) can also be adopted [23]. In aperture averaging, the receiver aperture needs to be far greater than the spatial coherence distance of the atmospheric turbulence in order to receive several uncorrelated signals.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the spherical concave mirror and convex lens in compensating turbulence effect on FSO systems

Hulea

Ghassemlooy

Rajbhandari

et al. 2014

2014 9th International Symposium on Communication Systems, Networks &Amp; Digital Sign (CSNDSP)

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This paper focuses on evaluating the performance of two aperture averaging methods used for compensating the effects of the air turbulence in free space optical (FSO) communications. These methods are based on using a concentration lens and spherical concave mirrors (SCM). The preliminary experimental results show that the quality of the received signal in terms of the Q-factor and the scintillation index is moderately improved when employing a lens in comparison to SCM for all turbulence regimes. However, these results were obtained with different collection areas and focal points. Therefore, a more rigorous approach using lens and SCM with the same aperture diameters and focal lengths needs to be adopted to ensure conclusive results.

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“…The standard deviation of beam location for the clear and turbulence channels were measured to be 7.26 and 42.54 μm , respectively. Note that, to reduce the effect of beam scattering at the Rx, this increase the received optical power level and improves the SNR, one could use a concave mirror with the optical Rx (or OF) located at its focal point as we demonstrated in our earlier work in [17].…”

Section: Channel Conditionmentioning

confidence: 99%

Implementation and Evaluation of a Gigabit Ethernet FSO Link for 'The Last Metre and Last Mile Access Network'

Abadi

Ghassemlooy

Mohan

et al. 2019

2019 IEEE International Conference on Communications Workshops (ICC Workshops)

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In this paper, we propose a simple and a lost cost 1 Gbps Ethernet free-space optical (FSO) communications link, which can be used both for the last meter and last mile access networks. In the emerging fifth generation wireless systems, which require at least an order of magnitude increase in the peak data rates and three orders of magnitude increase in network capacity with reduced latency, deploying multiple technologies will play a crucial role to meet these requirements. One possible complementary wireless technology to the radio frequency is the unlicensed FSO, which can bridge the gap between the existing RF wireless and optical fibre communication networks by providing high data rates, low installation costs and high energy efficiency. In this work, we propose a high-speed FSO system, which can be readily implemented using off the shelf components, and assess its performance experimentally under turbulence and fog conditions using the dedicated indoor atmospheric chamber. We show that, the proposed system under the turbulence condition with a scintillation index of. offers almost the same data rate (i.e., ~99%) as the link under a clear channel, while the packeterror-rate reduces from − to × − .

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Compensating for Optical Beam Scattering and Wandering in FSO Communications

Cited by 63 publications

References 16 publications

Experimental Investigation of All-Optical Relay-Assisted 10 Gb/s FSO Link Over the Atmospheric Turbulence Channel

Experimental Investigation of All-Optical Relay-Assisted 10 Gb/s FSO Link Over the Atmospheric Turbulence Channel

Evaluation of the spherical concave mirror and convex lens in compensating turbulence effect on FSO systems

Implementation and Evaluation of a Gigabit Ethernet FSO Link for 'The Last Metre and Last Mile Access Network'

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