Simulation-Based Optical Threshold Component Design for Mitigating Four-Wave Mixing Effects in WDM Radio Over Fiber Systems

2020 ◽  
Vol 41 (4) ◽  
pp. 429-436
Author(s):  
Ahmed Musa ◽  
Haytham Bany Salameh ◽  
Ayat Olaimat
Keyword(s):  
Optical Fiber ◽  
Wavelength Division Multiplexing ◽  
Communication Systems ◽  
Performance Metrics ◽  
Optical Fiber Communication ◽  
Four Wave Mixing ◽  
Radio Link ◽  
Wave Mixing ◽  
The Impact ◽  
Nonlinear Impairments

AbstractThe gigantic demand on high bandwidth and capacity has triggered the need to use the radio over optical fiber (RoF) systems. RoF systems offer several attractive features such as low attenuation loss, large bandwidth, less interference, etc., which can improve the communication system reliability and achieve high data rates. However, the RoF system suffers from linear and nonlinear fiber impairments, which result in signal distortion. Several solutions have been proposed to overcome linear impairments; on the other hand, the nonlinear impairments issue is still a challenging problem in RoF communication systems. Four-wave mixing (FWM) is the most dominating nonlinear impairments that impacts the performance of optical fiber communication systems and the RoF systems as well. In this article, we present a strategy to mitigate the FWM effect in wavelength division multiplexing (WDM) RoF systems. Specifically, we study the effect of FWM under high transmit power levels over long transmission distances. This proposed strategy aligns the optical and radio link parameters to alleviate the FWM effects. To achieve this objective, the impact of WDM RoF system parameters such as wavelength ($\lambda_i$), transmitted power, etc., on system performance is investigated. The main performance metrics are the total signal-to-noise ratio (SNR), optical SNR (OSNR), Q-factor, and bit error rate (BER). Given these metrics, our proposed strategy defines an optical threshold level that applies to the optical threshold component to get rid of the undesired signals generated by the FWM effect.

scholarly journals Performance Enhancement of DWDM-FSO Optical Fiber Communication Systems Based on Hybrid Modulation Techniques under Atmospheric Turbulence Channel

Photonics ◽  
2021 ◽  
Vol 8 (11) ◽  
pp. 464
Author(s):  
Mohammed R. Hayal ◽  
Bedir B. Yousif ◽  
Mohamed A. Azim
Keyword(s):  
Optical Fiber ◽  
Atmospheric Turbulence ◽  
Adaptive Optics ◽  
Communication Systems ◽  
Optical Fiber Communication ◽  
Passive Optical Network ◽  
Communication Link ◽  
Fiber Communication ◽  
Digital Pulse ◽  
The Impact

In this paper, we enhance the performance efficiency of the free-space optical (FSO) communication link using the hybrid on-off keying (OOK) modulation, M-ary digital pulse position modulation (M-ary DPPM), and M-pulse amplitude and position modulation (M-PAPM). This work analyzes and enhances the bit error rate (BER) performance of the moment generating function, modified Chernoff bound, and Gaussian approximation techniques. In the existence of both an amplified spontaneous emission (ASE) noise, atmospheric turbulence (AT) channels, and interchannel crosstalk (ICC), we propose a system model of the passive optical network (PON) wavelength division multiplexing (WDM) technique for a dense WDM (DWDM) based on the hybrid fiber FSO (HFFSO) link. We use eight wavelength channels that have been transmitted at a data rate of 2.5 Gbps over a turbulent HFFSO-DWDM system and PON-FSO optical fiber start from 1550 nm channel spacing in the C-band of 100 GHz. The results demonstrate (2.5 Gbps × 8 channels) 20 Gbit/s-4000 m transmission with favorable performance. In this design, M-ary DPPM-M-PAPM modulation is used to provide extra information bits to increase performance. We also propose to incorporate adaptive optics to mitigate the AT effect and improve the modulation efficiency. We investigate the impact of the turbulence effect on the proposed system performance based on OOK-M ary- PAPM-DPPM modulation as a function of M-ary DPPM-PAPM and other atmospheric parameters. The proposed M-ary hybrid DPPM-M-PAPM solution increases the receiver sensitivity compared to OOK, improves the reliability and achieves a lower power penalty of 0.2–3.0 dB at low coding level (M) 2 in the WDM-FSO systems for the weak turbulence. The OOK/M-ary hybrid DPPM-M-PAPM provides an optical signal-to-noise ratio of about 4–8 dB of the DWDM-HFFSO link for the strong turbulence at a target BER of 10−12. The numerical results indicate that the proposed design can be enhanced with the hybrid OOK/M-DPPM and M-PAPM for DWDM-HFFSO systems. The calculation results show that PAPM-DPPM has increased about 10–11 dB at BER of 10−12 more than the OOK-NRZ approach. The simulation results show that the proposed hybrid optical modulation technique can be used in the DWDM-FSO hybrid links for optical-wireless and fiber-optic communication systems, significantly increasing their efficiency. Finally, the use of the hybrid OOK/M-ary DPPM-M-PAPM modulation schemes is a new technique to reduce the AT, ICC, ASE noise for the DWDM-FSO optical fiber communication systems.

REVIEW ARTICLE ON THE MITIGATION OF FOUR WAVE MIXING IN OPTICAL COMMUNICATION SYSTEM

2021 ◽  
Vol 15 (1) ◽  
pp. 53-65
Author(s):  
Robert Oluwayimika Abolade ◽  
Oluwaseun Olayinka Tooki ◽  
David Oluwagbemiga Aborisade
Keyword(s):  
Wavelength Division Multiplexing ◽  
High Capacity ◽  
Nonlinear Effects ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Fibre Optics ◽  
Modulation Formats ◽  
Main Challenge ◽  
Dwdm System ◽  
Nonlinear Impairments

The main challenge faced in today's telecommunication is the ever increasing demand for bandwidth and data rates. The desire to expand the capacity of fiber optic communication to accommodate this demand accelerated the development of high capacity Dense Wavelength Division Multiplexing (DWDM) transmission equipment. However, nonlinear impairments are the fundamental limiting mechanisms to the amount of data that can be transmitted in DWDM. In DWDM, Four Wave Mixing is the most critical of nonlinear effects in fibre optics communication. This effect limits the DWDM’s channel capacity. There are numerous researches on nonlinear impairments that show the intricacy of FWM phenomena in DWDM system. This article present review of the several measures which have been carried out by researchers to overcome nonlinear effects in DWDM. Such measures include Modulation Formats, Channel Spacing, Channel Shuffling Algorithm and Electro-Optic Phase Modulation. The review provides insight into the methods, parameters and approaches used by other researchers. This will pave way for can thus lead to significant improvement in the design of DWDM system.

scholarly journals ANALISIS REDAMANTERHADAP PERFORMANCEDENSE WAVELENGTH DIVISION MULTIPLEXING (DWDM)PADA SISTEM KOMUNIKASI SERAT OPTIKDENGAN METODE LINK POWER BUDGET DI PT. TELKOM PADANG (STUDI KASUS LINK PADANG – LUBUK BASUNG)

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Farta Wendy Herdianta ◽  
Hanesman Hanesman ◽  
Delsina Faiza
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Wavelength Division Multiplexing ◽  
Power Output ◽  
Communication Systems ◽  
Single Mode ◽  
Optical Fiber Communication ◽  
Power Budget ◽  
Fiber Communication ◽  
The Core

The research was conducted by analyzing the optical fiber attenuation of the DWDM performance in terms of power received on optical fiber communication systems link Padang-Lubuk cone in PT. Telkom Padang. Optical fiber has a very small damping. Therefore optical fibers become the primary choice in telecommunications networks. To improve the transmission quality is better then the use of DWDM technology, DWDM technology is a method to insert a number of channels were transmitted in a single optical fiber. Instruments in this study is the Power Meter and OTDR JDSU MTS-2000 type, the type of cable used G.655 Single Mode type. Link Power Budget method is used to determine the performance of DWDM caused by attenuation based on the value of the received power output receiver. On the link Padang - Lubuk cone highest attenuation occurs in core 1 of 29.742dB with 100.035 km cable lengths, and the core 10 of 31.8 dB with 119.998 km cablelengths. Based on the large fault or attenuation/km core 1 of 0.297 dB/km, the core 10 of 0.265 dB/km and the standard ITU-T was 0.35 dB/km. Value attenuation/km core 1 and core 10 is still in normal conditions and under standard ITU-T 0.35 dB/km. Based on optical fiber attenuation, the results of analysis of the link power budget is the value of Rx is smaller than the value of Rx sensitivity of -27 dBm, it can be said performance DWDM optical fiber communication systems in normal and can be used to operate because the power output can still be accepted by receiver in the device. Keywords:optical fiber cable, optical fiber attenuation, DWDM, link power budget.

scholarly journals A Novel Ultra-Broadband Polarization Filter Based on a Microstructured Optical Fiber with a Gold-Coated Air Hole

Micromachines ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 816
Author(s):  
Chao Wang ◽  
Yajing Zhang ◽  
Zheng Wu ◽  
Qian Wang ◽  
Guoxu Zhang ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Wavelength Division Multiplexing ◽  
Communication Systems ◽  
Extinction Ratio ◽  
Resonance Effect ◽  
Optical Fiber Communication ◽  
Loss Ratio ◽  
Polarization Filter ◽  
Fiber Communication ◽  
Microstructured Optical Fiber

In this paper, a pentagonal microstructured optical fiber polarization filter by utilizing a surface plasmon resonance effect is proposed. The characteristics of the mode-coupling and filtering of the filter are studied by making use of the full-vector finite element method. The performance of the filter is greatly affected by the structure parameters. The losses of Y and X polarization of the fiber core are 665.97 and 0.17 dB/cm at 1.55 μm, respectively, and the loss ratio is 3917.47. This shows that the filter has a greater loss ratio. Moreover, both the extinction ratio and tolerance are also researched, which shows that the proposed filter has a wider filtering bandwidth and better fabrication tolerance. The designed filter has an important role in wavelength-division multiplexing (WDM) and coherent optical fiber communication systems.

A Real-Time Polarization Compensation System Based on Wavelength-Division Multiplexing for Optical Fiber Communication Systems

2020 ◽  
Vol 40 (14) ◽  
pp. 1406003
Author(s):  
黄媛 Huang Yuan ◽  
赵家钰 Zhao Jiayu ◽  
王金东 Wang Jindong ◽  
杜聪 Du Cong ◽  
彭清轩 Peng Qingxuan ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Real Time ◽  
Wavelength Division Multiplexing ◽  
Communication Systems ◽  
Optical Fiber Communication ◽  
Compensation System ◽  
Fiber Communication ◽  
Wavelength Division

Performance Analysis of Hybrid Fiber/FSO Backhaul Downlink over WDM-PON Impaired by Four-Wave Mixing

2019 ◽  
Vol 41 (1) ◽  
pp. 91-98
Author(s):  
Tu V. M. Pham ◽  
Thang V. Nguyen ◽  
Nga T. T. Nguyen ◽  
Thu A. Pham ◽  
Hien T. T. Pham ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Wavelength Division Multiplexing ◽  
Optical Network ◽  
Avalanche Photodiode ◽  
Four Wave Mixing ◽  
Passive Optical Network ◽  
Wave Mixing ◽  
High Data ◽  
The Impact ◽  
Wdm Pon

Abstract In this paper, we examine the hybrid optical fiber (OF)/free-space optics (FSO) architecture for a backhaul downlink over a wavelength-division multiplexing passive optical network (WDM-PON). The hybrid backhaul architecture is able to provide not only high-data-rate but also flexibility and quick deployment. The performance analysis is carried out for the hybrid OF/FSO backhaul downlink over a four-wavelength WDM-PON under the effect of four-wave mixing (FWM). The impact of atmospheric turbulence-induced fading and major noise components, including amplifier’s noise, shot noise, beat noise, background noise, and thermal noise, is also taken into account. The numerical results show that, although high transmitted power and amplifier’s gain at the transmitter side help to mitigate the impact of noise and fading, they should be limited to a specific value to avoid the influence of FWM. Therefore, the use of amplifier or avalanche photodiode at the receiver side would be a better solution to keep the bit-error rate (BER) at the low levels.

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