Comparison of wavelength propagation for Free Space Optical Communications

Naimullah, Bibi Sarpinah Sheikh; Othman, M. B.; Rahman, A. K.; Sulaiman, Shahril Irwan; Ishak, Siti Zanariah Ahmad; Hitam, S.; Aljunid, S. A.

doi:10.1109/iced.2008.4786657

Cited by 23 publications

(11 citation statements)

References 5 publications

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“…INTRODUCTION Transmission by light (laser) over free space has received a significant attention as a complementary technology to the radio frequency (RF) based techniques by a number of researchers [1,2]. The ever increasing demand for higher bandwidth coupled with last mile bottleneck imposed by the RF based systems have forced service providers to look for alternative systems in certain dedicated applications.…”

mentioning

confidence: 99%

Performance of BPSK Subcarrier Intensity Modulation Free-Space Optical Communications using a Log-normal Atmospheric Turbulence Model

Tang

Rajbhandari

Popoola

et al. 2010

2010 Symposium on Photonics and Optoelectronics

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mentioning

confidence: 99%

Performance of BPSK Subcarrier Intensity Modulation Free-Space Optical Communications using a Log-normal Atmospheric Turbulence Model

Tang

Rajbhandari

Popoola

et al. 2010

2010 Symposium on Photonics and Optoelectronics

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“…Fig. 4b shows the PDF of the measured samples (in grey), which is being compared with predicted G-G PDF (in black) calculatedthrough (8)taking into account the measured scintillation index (obtained by (5)).…”

Section: Measurement Resultsmentioning

confidence: 99%

“…air) and it is collected at the receiver by means of telescope, detector, and demodulator. The most common wavelengths used in FSO links are in the range of 0.85 -1.55 μm, and more specifically at wavelengths of 780 nm, 850 nm and 1550 nm, with the latter two coinciding with the optical fibre communications 1 st and 3 rd transmission windows [1,5].…”

Section: Introductionmentioning

confidence: 99%

Indoor free space optics link under the weak turbulence regime: measurements and model validation

Pernice¹,

Andò²,

Cardinale³

et al. 2015

IET Communications

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Institution of Engineering and Technology (IET)Pernice Abstract:In this paper, we present the measurements performed on a free space optics (FSO) communications link using an indoor atmospheric chamber. In particular, we have generated several different optical turbulence conditions, demonstrating how even the weak turbulence regime can strongly affect the FSO link performance. We have carried out an in-depth analysis of the data collected during the measurements, and calculated the turbulence strength (i.e. scintillation index and Rytov variance) and the important performance metrics (i.e., the Q-factor and bit error rate) to evaluate the FSO link quality.Moreover, we have tested, for the first time, an appositely developed temporally-correlated Gamma-Gamma channel model to generate the temporal irradiance fluctuations observed at the receiver. This has been accomplished by using a complete analysis tool that enables us to fully simulate the experimental FSO link. Finally, we compare the generated time-series with the collected experimental data, showing a good agreement and thus proving the effectiveness of our model.

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“…In practice, the common candidates are wavelengths of 780 nm, 950 nm, and 1550 nm, respectively [23,24]. This happens since the optical components that are commercially available are constructed to operate at these specific wavelengths following the specifications of the ones used in fiber optic communications.…”

Section: A Number Of Transceivers For a Given Service Lengthmentioning

confidence: 98%

Weather Effects on FSO Network Connectivity

Vavoulas

Sandalidis

Varoutas

2012

J. Opt. Commun. Netw.

107

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The use of relays is one of the most promising methods for mitigating impairments of the performance of free-space optical (FSO) systems and extending their limited transmission range. However, several factors contribute to significant link performance degradation. Most severe is the influence of the adverse atmospheric conditions that frequently appear, thus making the design of strongly connected networks a demanding issue. In this paper, we consider a multiple-hop FSO network, where the nodes are distributed at fixed positions on a given path-link. We take account of the most critical weather phenomena, i.e., fog, rain, and snow, and derive analytical expressions for the node isolation probability, assuming a suitable path loss model. Next, we find the number of transceivers for a given path-link in order to achieve reliable performance. We also examine the reverse case; i.e., we find the total service length for a known number of FSO transceivers. The effect of the prime FSO modulation formats is also considered. The addressed analytical framework offers significant insights into the main factors that degrade the performance of FSO networks. It constitutes a valuable tool for telecom researchers to design such networks in practice.

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Comparison of wavelength propagation for Free Space Optical Communications

Abstract: Abstract

Cited by 23 publications

References 5 publications

Performance of BPSK Subcarrier Intensity Modulation Free-Space Optical Communications using a Log-normal Atmospheric Turbulence Model

Performance of BPSK Subcarrier Intensity Modulation Free-Space Optical Communications using a Log-normal Atmospheric Turbulence Model

Indoor free space optics link under the weak turbulence regime: measurements and model validation

Weather Effects on FSO Network Connectivity

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