Investigation and Demonstration of High Speed Full-Optical Hybrid FSO/Fiber Communication System Under Light Sand Storm Condition

Esmail, Maged Abdullah; Ragheb, Amr; Fathallah, Habib; Alouini, Mohamed‐Slim

doi:10.1109/jphot.2016.2641741

Cited by 76 publications

(29 citation statements)

References 14 publications

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“…The lenses of the collimators have full-angle beam divergence of 0.032 • , with a 3.6-mm output-beam diameter. The all-optical FSO link is transparent to the fiber, where no OE or EO conversion is required, as in traditional FSO links [13].…”

Section: Ieee Photonics Journal Xxxxxmentioning

confidence: 99%

K-Band Centralized Cost-Effective All-Optical Sensing Signal Distribution Network

et al. 2020

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In this work, we propose and experimentally demonstrate a centralized all-optical network for sensing signal distribution to a large number of remote sites. The reach range of high-resolution sensing systems is often limited due to atmospheric effects. Employing a centralized optical fiber network for signal distribution to different nodes increases the effective reach distance, decreases the power consumption, and reduces the overall cost of the sensing system. The proposed centralized all-optical network is structured such that it has an all-optical wavelength converter hosted at a central office to guide a sensing signal to a specific site/sensor. This system enables using shared equipment in the transmitter which in turn reduces the overall cost of the network. The performance of the proposed system is investigated by transmitting a radar signal over various transmission media, i.e. fiber, free space optic (FSO), and hybrid fiber/FSO. Some empirical formulas for the signal power and dynamic range (DR) are derived. The results show that although optical signal switching introduces a penalty of 2.5-dB in the signal (DR), the signal still preserves its good shape and spectrum quality. In addition, the experimental results show the system performance with respect to target detection and range estimation.

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Section: Ieee Photonics Journal Xxxxxmentioning

confidence: 99%

K-Band Centralized Cost-Effective All-Optical Sensing Signal Distribution Network

et al. 2020

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“…A number of turbulence mitigation techniques such as spatial transmitter (Tx)/Rx diversity, adaptive beamforming, multiple-beam communication or novel modulation techniques [1,11] have been proposed but at the cost of increased circuit complexity and signal processing requirements. To date, only a few studies have been reported on the fully integrated OF and a long length outdoor FSO links [3,12]. In [3], a 20 channels ultra-dense wavelength-division multiplexed passive optical network at 625 Mbaud over 100 km standard singlemode fibre (SMF) and 54 m long FSO links was successfully demonstrated using dual-polarization quadrature phase-shift keying (DP-QPSK) modulation and a coherent Rx.…”

Section: Introductionmentioning

confidence: 99%

“…In [3], a 20 channels ultra-dense wavelength-division multiplexed passive optical network at 625 Mbaud over 100 km standard singlemode fibre (SMF) and 54 m long FSO links was successfully demonstrated using dual-polarization quadrature phase-shift keying (DP-QPSK) modulation and a coherent Rx. In [12], 18 Gbaud 32-quadrature amplitude modulation (32-QAM) transmission using an in-phase and quadrature modulator and a tunable optical filter was demonstrated over 22 km of SMF and 100 m FSO links. However, in [3,12] the modulation formats, devices and the detection method adopted were too complex and costly for the practically low-cost optical access networks [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…In [12], 18 Gbaud 32-quadrature amplitude modulation (32-QAM) transmission using an in-phase and quadrature modulator and a tunable optical filter was demonstrated over 22 km of SMF and 100 m FSO links. However, in [3,12] the modulation formats, devices and the detection method adopted were too complex and costly for the practically low-cost optical access networks [13][14][15]. In [16], a bidirectional 10 Gbps hybrid OF-FSO link for use in outdoor environments was proposed, where an erbium-doped fibre amplifier was employed to compensate for losses due to the OF-FSO channel.…”

Section: Introductionmentioning

confidence: 99%

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Mitigation of dispersion and turbulence in a hybrid optical fibre and free-space optics link using electronic equalisation

Nguyen

Zvánovec

Ghassemlooy

2019

Optik

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Transmission of a 25 Gbps non-return to zero signal over a hybrid link of 20 km standard single-mode fibre and 500 m free-space optics under weak-to-moderate turbulence regimes is demonstrated via simulation to provide a practical solution for the last-mile access networks. Even though there are several complex mitigating methods to reduce the waveform distortions caused by both the fibre chromatic dispersion and atmospheric turbulence, we provide and discuss a simple approach using an electrical equalizer at the receiver. The simulation results demonstrate that, the proposed equalization technique offer about an order of magnitude improvement in the bit error rate at the received optical power of-20 dBm and a receiver sensitivity gain of 1.5 dB at the 7% forward error correction limit.

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“…Coupling free-space beams into single-mode fiber has widespread applications in optical communication links, such as space-to-ground or the last mile links [1], [2]. Due to the ability to integrate with erbium-doped fiber amplifier, fiber-optic detectors are used as receivers to improve signal quality for further demodulation or transmission.…”

Section: Introductionmentioning

confidence: 99%

Free-Space to Fiber Coupling of Electromagnetic Gaussian Schell-Model Beams in Turbulent Marine Atmospheric Channel

Zhang

2018

IEEE Photonics J.

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We present a method to analyze the fiber coupling efficiency η of electromagnetic Gaussian Schell-model (EGSM) beams propagating through marine atmospheric turbulence. The expression for η is derived from the relation of field distributions between EGSM beam and fiber mode. The influence factors of η are discussed, including the properties of EGSM beam, focusing lens, and turbulence. We find that η declines as the turbulence enhances. A large-aperture lens and an EGSM beam with high coherence, long wavelength, and optimum beam width are able to achieve a higher η in turbulent links. Beam polarization also takes effect on η but the effect is complex. Our investigation has applications in the fiber coupling of vectorial beams in communication systems.

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Investigation and Demonstration of High Speed Full-Optical Hybrid FSO/Fiber Communication System Under Light Sand Storm Condition

Cited by 76 publications

References 14 publications

K-Band Centralized Cost-Effective All-Optical Sensing Signal Distribution Network

K-Band Centralized Cost-Effective All-Optical Sensing Signal Distribution Network

Mitigation of dispersion and turbulence in a hybrid optical fibre and free-space optics link using electronic equalisation

Free-Space to Fiber Coupling of Electromagnetic Gaussian Schell-Model Beams in Turbulent Marine Atmospheric Channel

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