All-Optical Amplify-and-Forward Relaying System for Atmospheric Channels

Kashani, Mohammadreza A.; Rad, M.M.; Safari, Majid; Uysal, Murat

doi:10.1109/lcomm.2012.082012.121066

Cited by 85 publications

(68 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The relays are located at equal distance between S and D in order to ensure that FSO links were balanced and SNR was the same for each hop. Based on the measured temperature profile and the calculation using (5), (6) and (7) m -2/3 , and 5.4 × 10 −12 m -2/3 corresponding to 2 of 0.77, 0.11, and 0.01, respectively for total link span of 6.6 m. Results are validated theoretically by means of numerical evaluation of the BER using (22). Fig.…”

Section: Resultsmentioning

confidence: 97%

“…In most previous works reported on relay-assisted FSO networks, the OA gain ℊ was assumed to be fixed [15], [19], [20], [22], [34]. However, in this work we define ℊ for jth OA relay (j = 1, 2, 3) as [24]:…”

Section: B Signal Transmission Formulationmentioning

confidence: 99%

“…Alternatively, the entire system could be kept in the optical domain by introducing all-optical relay modules. Analysis of all-optical FSO relay-based systems employing the erbium-doped fiber amplifier (EDFA) based amplify-andforward (AF) relay were reported in [19]- [22]. In particular, Monte Carlo simulation results for the bit error rate (BER) performance for the FSO relay system using fixed-gain optical amplifiers or optical regenerators under the weak turbulence regime was reported in [20].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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.

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 97%

Section: B Signal Transmission Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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.

View full text Add to dashboard Cite

“…These are spatial-diversity [9], time-diversity [10], cooperative diversity [11], optical amplification [12], photo sensor design [13], and adaptive optics [14]. The aforementioned methods have several common drawbacks, such as a high complexity and decreased bit-rate-capacity processing.…”

Section: Introductionmentioning

confidence: 99%

Optical Spatial Filter to Suppress Beam Wander and Spatial Noise Induced by Atmospheric Turbulence in Free-Space Optical Communications

Darusalam

Priambodo

Rahardjo

2015

Advances in Optical Technologies

View full text Add to dashboard Cite

We propose an optical spatial filter (OSF) method to suppress beam wander and spatial noise effects. Signal from random displacements of the focus spot around the optical axis within the constricted area is collected. This method advantageously suppresses fluctuations in signal intensity. The OSF consists of a pinhole and cone reflector. The pinhole produces Fresnel diffraction on the focus spot. The cone reflector provides directed reflectance onto the pinhole for random focus spot displacements due to beam wander. The calculations of signal power are based on fluctuations of signal intensity that are minimized by the circular aperture function of the pinhole and the cosine of the reflectance angle from the cone reflector. The method is applied to free-space optical communications at a wavelength of 1.55 m with an atmospheric chamber to provide optical propagation media. Based on calculations, the beam wander angles that can be received by the OSF are from 14.0 ∘ to 28.0 ∘ . Moreover, based on experiment, the OSF with a pinhole diameter of 20.0 m and cone reflector diameter of 1.5 mm produces signal power of −15.3 dBm. Both calculations and experiment show that the OSF enhances the received signal power in the presence of turbulence.

show abstract

“…EDFAs are a mature technology, which has a wide-spread use in optical fiber communications as a preamplifier or an in-line amplifier in the 1550 nm range [18]. The application of EDFAs in FSO AF relays has been recently proposed in [20][21][22]. However, results in [22] only included the amplified spontaneous emission (ASE) noise and shot noise caused by background radiation without considering the weather conditions in the FSO system.…”

Section: Introductionmentioning

confidence: 99%

Performance of All-Optical Multihop RoFSO Communication System over Gamma-Gamma Atmospheric Turbulence Channels

Zong

Zhu

2015

Journal of the Optical Society of Korea

View full text Add to dashboard Cite

In this paper, we analyze the performance of the all-optical multihop radio over a free space optical (RoFSO) communication system with amplify-and-forward (AF) relays under varying weather conditions. The proposed channel model considers the propagation loss, attenuation and atmospheric fading modeled by the Gamma-Gamma (GG) distribution. Both the amplified spontaneous emission (ASE) noise in the all-optical relays and the background noise projected onto receiver apertures have been considered in the analysis. The lower bound analytical expressions for the end-to-end bit error rate (BER) and outage probability are derived for the multihop system employing the all-optical relays with the full channel state information (CSI). Meanwhile, the exact results for BER and outage probability are obtained via Monte Carlo simulation. Results indicate the performance of the proposed system will be improved by the multihop transmission technology. For a fixed number of relays, the BER and outage probability will be increased with the deterioration of the weather conditions.

show abstract

All-Optical Amplify-and-Forward Relaying System for Atmospheric Channels

Cited by 85 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

Optical Spatial Filter to Suppress Beam Wander and Spatial Noise Induced by Atmospheric Turbulence in Free-Space Optical Communications

Performance of All-Optical Multihop RoFSO Communication System over Gamma-Gamma Atmospheric Turbulence Channels

Contact Info

Product

Resources

About