RZ Line Coding Scheme With Direct Laser Modulation for Upgrading Optical Transmission Systems

El-Hageen, Hazem M.; Alatwi, Aadel M.; Rashed, Ahmed Nabih Zaki

doi:10.1515/eng-2020-0066

Cited by 85 publications

(5 citation statements)

References 31 publications

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“…The Q-factor and BER are studied against fiber length, gain, number of amplifiers and channel spacing. The trade-off operating parameters is tested to achieve optimized Q-factor and BER [31][32][33][34][35][36].…”

Section: Related Workmentioning

confidence: 99%

High speed pulse generators with electro-optic modulators based on different bit sequence for the digital fiber optic communication links

Eid

Seliem

Rashed

et al. 2021

IJEECS

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The paper outlines the simulation of various pulse generators for the enhancement of optical fiber access transmission networks within flow rate of 10 Gbps and transmission range of 100 km. The pulse generators are gaussian, hyperbolic secant, triangle, sine, raised cosine in the transmission stage. Proposed pulse generators are mixed with both electro-absorption modulator (EAM) and mach-zehnder modulator (MZM) for efficient transmission. We have compared the max. the quality factor with using proposed pulse generators against nonreturn to zero (NRZ) return to zero (RZ) pulse generators in the previous research works for different bit sequences. The signal power amplitude is tested for both optical fiber and PIN photodetector optical time-domain visualizer and RF spectrum analyzer by using in the optimum cases for different bit sequence. It is observed that proposed pulse generators/EAM have presented an efficient increase in Q-factor value compared with proposed pulse generators/MZM for different bit sequences.

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Section: Related Workmentioning

confidence: 99%

High speed pulse generators with electro-optic modulators based on different bit sequence for the digital fiber optic communication links

Eid

Seliem

Rashed

et al. 2021

IJEECS

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“…The range of these parameters can vary from 1 to 1000. -209 dispersion compensation, the value of forward tap coefficient should not be more than forward tap spaces [25,26]. Table 2 depicts the major parameters of the simulation including bit rate and standard frequency for communication, while the simulation parameters of SMF are shown in Table 3.…”

Section: Range Of Parametersmentioning

confidence: 99%

“…The range of these parameters can vary from 1 to 1000. For proper dispersion compensation, the value of forward tap coefficient should not be more than forward tap spaces [25, 26].…”

Section: Range Of Parametersmentioning

confidence: 99%

Research on dispersion compensation using avalanche photodiode and pin photodiode

Chen

Wang

et al. 2020

IET Collab Intel Manufact

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With the growing demand for usage among Internet users, inventions related to increase in the capacity and bandwidth of transmission channels are more significant nowadays. This continuously growing demand can be fulfilled by using the optical fibre for transmission of signals instead of the wireless mode of transmission, due to the less nonlinearity present in the optical fibre. As every available mode has its own shortcomings so does the optical fibre. It suffers from dispersion and other linearities when long-distance transmission is considered. Hence, the field of invention is associated with the compensation of dispersion in optical fibre communication at higher bit rates of 50-80 Gbps for longer distances of 120 km. After their compensation, comparison of two photodiodes, that is, pin diode and avalanche photodiode has been done at these distinct bit rates in order to achieve the best suited photodiode. After the complete analysis of simulations in terms of quality factor and bit error rate, it has been observed that at distinct bit rates of 50-80 Gbps, the simulation model using avalanche photodiode exhibits superior performance to that of the pin diode. The comparison results show that the performance of the avalanche photodiode is around 11% better than the pin diode.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…The max quality factor and min data error rate are tested for different optical receivers (PIN, and APD photodetectors) with different types of noise (shot noise, and thermal noise). RoF systems is stimulated based on NRZ coding for a bit rate of 2.5 Gb/s [29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Duobinary modulation/predistortion techniques effects on high bit rate radio over fiber systems

Eid

Seliem

Rashed³

et al. 2021

IJEECS

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The work has presented duobinary modulation and predistortion techniques for the radio over fiber system enhancement for achieving security level. Duobinary modulation technique has more compact modulated spectral linewidth with standard non return to zero modulation code. Different NRZ/RZ rectangle shape employed that are namely exponential rectangle shape (ERS), and Gaussian rectangle shape (GRS) for different transmission bit rates. Switching bias voltage, and switching RF voltage based LiNbO3 modulator are changed to measure the performance parameters of the radio over fiber (RoF) system. Predistortion technique improves the linearity of transmitter amplifiers and it is considered as a power efficiency technique. The optimum values of the Q-factor, data error rate (BER), electrical power, signal gain, noise figure, and light signal/noise ratio are achieved with 8 Volt for both switching biases/switching RF signal at 100 GHz. Signal quality/BER and electrical power after the receiver enhancement ratio by using this technique at different RF signal frequencies.

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RZ Line Coding Scheme With Direct Laser Modulation for Upgrading Optical Transmission Systems

Cited by 85 publications

References 31 publications

High speed pulse generators with electro-optic modulators based on different bit sequence for the digital fiber optic communication links

High speed pulse generators with electro-optic modulators based on different bit sequence for the digital fiber optic communication links

Research on dispersion compensation using avalanche photodiode and pin photodiode

Duobinary modulation/predistortion techniques effects on high bit rate radio over fiber systems

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