scholarly journals Hybrid CPFSK/OQPSK modulation transmission techniques’ performance efficiency with RZ line coding–based fiber systems in passive optical networks

2021 ◽  
Vol 21 (1) ◽  
pp. 263
Author(s):  
Aadel M. Alatwi ◽  
Ahmed Nabih Zaki Rashed
Keyword(s):  
Optical Networks ◽  
Fiber Length ◽  
Modulation Frequency ◽  
Electrical Power ◽  
Optical Power ◽  
Continuous Phase ◽  
Passive Optical Networks ◽  
Noise Power ◽  
Q Factor ◽  
Shift Keying

<p><span>This study shows hybrid continuous-phase frequency shift keying (CPFSK)/optical quadrature-phase shift keying (OQPSK) modulation transmission techniques’ performance efficiency with return-to-zero (RZ) line coding scheme–based fiber systems in passive optical networks. Max. Q factor/min. bit error rate variations versus modulation frequency and fiber length are studied in detail for various bits/symbol, based on hybrid proposed modulation transmission techniques. Also, optical power and received electrical power variations are simulated with fiber-length variations at a specified modulation frequency of 300 GHz. Max. Q Factor, min. BER, max. signal power, and min. noise power variations are based on hybrid modulation techniques for CPFSK/OQPSK of 32 bits/symbol and a modulation frequency of 500 GHz through a fiber length of 30 km.</span></p>

Investigation of Performance Affecting Parameters on Hybrid Passive Optical Networks

2020 ◽  
Vol 41 (2) ◽  
pp. 167-170
Author(s):  
Anil Kumar ◽  
Rajneesh Randhawa
Keyword(s):  
Optical Networks ◽  
Bit Error Rate ◽  
Error Rate ◽  
Fiber Length ◽  
Passive Optical Networks ◽  
Q Factor ◽  
Hybrid Wave ◽  
Data Rates ◽  
Length Data ◽  
Time Division

AbstractIn the evolvement of current passive optical networks (PONs), there is ever increasing bandwidth demand due to dynamic service requirements. This introduces challenge for the choice of multiplexing technique and physical layer bounds like fiber length, data rate, and number of users are critical over a suitable architecture. In this article, hybrid wave division multiplexing-time division multiplexing PON is analyzed using variable length of fiber with data rates up to 40 Gbps over a maximum of 128 end users. Comparative study using different frequency spacing’s has shown that it has negligible effect on the Q-factor performance parameter. Further in the work, variable data rates required for different services is successfully transmitted up to 30 km to 128 number of users for an acceptable level of bit error rate.

Simulative analysis of different modulation formats for RoF Transmission System

2016 ◽  
Vol 37 (1) ◽  
Author(s):  
Kulwinder Singh ◽  
Kamaljit Singh Bhatia ◽  
Hardeep Singh Ryait ◽  
Amandeep Kaur
Keyword(s):  
Power Spectrum ◽  
Fiber Length ◽  
Electrical Power ◽  
Optical Loss ◽  
Optical Power ◽  
Transmission System ◽  
Radio Over Fiber ◽  
Operating Conditions ◽  
Q Factor ◽  
Modulation Formats

AbstractThis paper has represented the operating conditions for radio-over-fiber (RoF) transmission system such as Q factor, received optical power and BER at different fiber lengths. This paper also investigated optical loss, optical power spectrum and electrical power spectrum at different frequencies for different modulation formats and optical loss at different radio frequencies for varying fiber length.

A Comparative Analysis of Dual-Order Bidirectional Pumping Schemes in Optical Fiber Raman Amplification

2019 ◽  
Vol 40 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Kulwinder Singh ◽  
Manjeet Singh Patterh ◽  
Manjit Singh Bhamrah
Keyword(s):  
Comparative Analysis ◽  
Fiber Length ◽  
Noise Figure ◽  
Signal To Noise Ratio ◽  
Optical Power ◽  
Optical Signal ◽  
Input Power ◽  
Q Factor ◽  
Wavelength Division ◽  
First Order

Abstract In this paper, dual-order bidirectional pumping schemes of distributed fiber Raman amplifier are compared with standard first-order pumping in wavelength division multiplexed optical transmission systems. The novel comparison analysis is carried out in terms of Optical signal-to-noise ratio and Q-factor, on-off gain and noise figure by varying optical input power and fiber lengths. The results indicate that dual-order schemes present 0.02 dB higher OSNR and 5 dB higher Q-factor in comparison to first-order pumping when input optical power is varied from −4 to 5 dBm. Similarly, there is 4 dB higher on-off gain with dual order comparatively to first order when fiber length varied from 10 to 100 km. However, there is degradation in noise figure and Q-factor due to DRBS noise with dual-order pumping when fiber length from 10 to 100 km. Further, the signal power evolutions along fiber length show that there is 5 dBm improvement for 100 km fiber. The novelty of the work is that comparative analysis exhibits improvement in OSNR, on-off gain and Q-factor using dual-order bidirectional pumping.

Usage of Optical Power Meter in Passive Optical Networks

2011 ◽  
Vol 30 (5) ◽  
pp. 308-321 ◽  
Author(s):  
Edvin Skaljo ◽  
Aljo Mujcic ◽  
Nermin Suljanovic
Keyword(s):  
Optical Networks ◽  
Optical Power ◽  
Passive Optical Networks ◽  
Power Meter

Four bits data sequence generators based ytterbium doped fiber amplifiers for upgrading maximum Q factor and minimum BER

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Aadel M. Alatwi ◽  
Ahmed Nabih Zaki Rashed ◽  
IS Amiri
Keyword(s):  
Electrical Power ◽  
Optical Power ◽  
Fiber Amplifiers ◽  
Q Factor ◽  
Data Sequence ◽  
Time Duration ◽  
Received Power ◽  
Time Period ◽  
Amplitude Level ◽  
Period Duration

AbstractWe have simulated four bits data sequence generators based ytterbium-doped fiber amplifiers for upgrading max. Q factor and min. BER. Optical power variations against time duration after fiber cable length of 250 km with the bits sequence generators of 0101, 1000, and 1010 respectively are simulated. As well as the electrical power/total received power variations against frequency after photodetector receiver with the bits sequence generators of 0101, 1000, and 1010 respectively are discussed in details. Moreover, the signal power amplitude level with the time period duration after photodetector receiver/3R regenerator with the bits sequence generators of 0101, 1000, and 1010 respectively are clarified to show the max. Q factor and min. BER values for each case.

Cascaded stages of parametric optical fiber amplifiers with Raman fiber amplifiers for upgrading of telecommunication networks through optical wireless communication channel

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mahmoud M.A. Eid ◽  
Eslam Shehata ◽  
Ahmed Nabih Zaki Rashed
Keyword(s):  
Optical Fiber ◽  
Electrical Power ◽  
Optical Power ◽  
Optical Signal ◽  
Electrical Signal ◽  
Telecommunication Networks ◽  
Fiber Amplifiers ◽  
Total Power ◽  
Q Factor ◽  
Power Meter

Abstract This paper contains a main model which concludes a two optical fiber cable along 70 km and with Parametric/Raman amplifiers with a result of total power 0.781 dBm that computed by the optical power meter which is located before the receiver part and the second optical fiber channel, a total power −44.186 dBm at the end of model which is computed by the electrical power meter visualizer, and a max. Q factor 2.548 computed by the BER analyzer. The suggested model has outlined some updates on the previous model to improve the results so that the results are increased at the same length as the following: total power of optical signal becomes 10.039 dBm, total power of electrical signal becomes 0.624 dBm, and the max. Q factor becomes 9.60787.

scholarly journals A pulse amplitude modulation scheme based on in-line semiconductor optical amplifiers (SOAs) for optical soliton systems

2021 ◽  
Vol 21 (2) ◽  
pp. 1014
Author(s):  
Aadel M. Alatwi ◽  
Ahmed Nabih Zaki Rashed
Keyword(s):  
Amplitude Modulation ◽  
Fiber Length ◽  
Optical Amplifiers ◽  
Electrical Power ◽  
Semiconductor Optical Amplifiers ◽  
Pulse Amplitude ◽  
Pulse Amplitude Modulation ◽  
Q Factor ◽  
Modulation Schemes ◽  
Injection Currents

<p>The objective of this work is to simulate a pulse amplitude modulation (PAM) scheme based on in-line semiconductor optical amplifiers for optical soliton systems. The max. power for soliton systems, based on various bits/symbol PAM modulation schemes after a fiber length of 100 km, is simulated and clarified. In addition to the max. Q factor for soliton systems, PAM modulation schemes with various in-line SOA injection currents and a fiber length of 100 km are also simulated and demonstrated in the results. The total electrical power after photo-detectors for soliton systems, based on PAM modulation schemes with various in-line SOA injection currents and a fiber length of 100 km, is also simulated and clarified in the results. The study emphasizes that the higher the SOA injection current, the higher the electrical power and the lower the Q factor that can be achieved in the soliton system.</p>

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