DSP-Assisted Nonlinear Impairments Tolerant 100 Gbps Optical Backhaul Network for Long-Haul Transmission

Irfan, Muhammad; Ali, Farman; Muhammad, Fazal; Habib, Usman; Alwadie, Abdullah; Głowacz, Adam; Abbas, Ziaul Haq; Kańtoch, Eliasz

doi:10.3390/e22091062

Cited by 10 publications

(5 citation statements)

References 28 publications

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“…The single-sideband modulator is used for coding the test light with the help of frequency multiplexing. This procedure provides flexibility in experimental and vibration computations and shows a clear difference from the mechanisms discussed in [16,[24][25][26]. As compared to the previous investigations, where electro-optical and acousto-optic modulators are used for frequency multiplexing and pulse inductions, respectively, this model produces the pulses by injecting a dummy frequency element among the multiplexed frequencies.…”

Section: Discussionmentioning

confidence: 99%

Analyzing Distributed Vibrating Sensing Technologies in Optical Meshes

et al. 2022

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Hundreds of kilometers of optical fibers are installed for optical meshes (OMs) to transmit data over long distances. The visualization of these deployed optical fibers is a highlighted issue because the conventional procedure can only measure the optical losses. Thus, this paper presents distributed vibration sensing (DVS) estimation mechanisms to visualize the optical fiber behavior installed for OMs which is not possible by conventional measurements. The proposed technique will detect the power of light inside the optical fiber, as well as different physical parameters such as the phase of transmitted light inside the thread, the frequency of vibration, and optical losses. The applicability of optical frequency domain reflectometry (OFDR) and optical time-domain reflectometry (OTDR) DVS techniques are validated theoretically for various state detection procedures in optical fibers. The simulation model is investigated in terms of elapsed time, the spectrum of a light signal, frequency, and the impact of many external physical accidents with optical fibers.

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Section: Discussionmentioning

confidence: 99%

Analyzing Distributed Vibrating Sensing Technologies in Optical Meshes

et al. 2022

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“…The drawback of the proposed design is the complexity of the transmitter architecture. Reference [13] modeled a Digital Signal Processing NL impairment tolerant 100 Gbps for long-distance optical network. The researchers were not specific about the type of impairment suitable with the developed model.…”

Section: Related Workmentioning

confidence: 99%

Tolerance of 16-Channel Dense Wavelength Division Multiplexing System to Fibre Dispersion and Four-Wave Mixing under Varying Capacities and Channel Spacing

Tooki¹,

Abolade

Aborisade

2022

EJECE

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An essential feature of a long-haul Optical Communication System (OCS) is to transmit huge volumes of data over long distances. In OCS, fiber dispersion and Four-Wave Mixing (FWM) play negative roles in achieving this, as the propagation of the light signal, associated with the pulse, travels at varying speeds. Dense Wavelength Division Multiplexing (DWDM) system is not spared from these identified limitations. In this work, a mathematical analysis for the dispersion and FWM was presented and validated through simulation software. The research was designed and implemented using an optical simulation software tool, OptiSystem 17.0. Transmission parameters of dispersion and Nonlinear (NL) effects due to refractive index, FWM, were considered. The research was carried out on a 125 km-long fiber link and was investigated under a 16-channel DWDM system. The effects of identified limitations on the performance of the DWDM system with channel arrangement of 100, 50, and 25 GHz were further explored. This work compared the DWDM system under these different channel arrangements. The transmission performance of the DWDM system was evaluated based on signal power, noise power, and eye pattern. The results obtained show that any increase in capacity causes significant decreases in the performance of the DWDM system. It was, however, noted that noise power is independent of an increase in bit rate. The results obtained further revealled that the launched power of the system must be reduced for better performance of the DWDM system and improved immunity against identified limitations.

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“…However, high and ultra-high data rate optical transmissions employing high-order modulation schemes are critically affected by optical fibre impairments, limiting their reach [8,9]. Digital signal processing (DSP) techniques and coherent detection have become popular for compensating fibre impairments and promise to be a potential solution for designing high data rate transmissions.…”

Section: Introductionmentioning

confidence: 99%

Digital backpropagation based on binary logarithmic step size distribution for fibre non‐linearity compensation

Dede,

Akowuah,

Haxha

2023

The Journal of Engineering

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Capacity crunch has become critical in recent years as commercial communication systems approach their theoretical data rate limits. This work presents a low‐complexity digital backpropagation (DBP) implementation approach based on step size distribution that uses a binary logarithmic step size method to achieve high data rate optical transmission. The proposed scheme shows performance improvements (∆Q) of 2.36, 1.19, and 0.71 dB over linear compensation, constant step size (CSS) DBP, and logarithmic step size DBP techniques in a 2400 km 112 Gbit/s DP‐16 quadrature amplitude modulation (QAM) system, respectively. At 13 dBm, a high performance (Q) of 10.9 dB (BER = 2.25 × 10−4) is achieved, above the 3.80 × 10−3 hard‐decision forward error correction (HD‐FEC) limit, using the proposed scheme. Also, the allowable transmission distance is extended by 960 km at the HD‐FEC limit over the linear compensation technique. The optimization achieves a 38% saving in the number of DBP calculation steps compared to the CSS DBP, which considerably reduces the computational cost since a few steps are required for effective non‐linearity compensation.

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DSP-Assisted Nonlinear Impairments Tolerant 100 Gbps Optical Backhaul Network for Long-Haul Transmission

Cited by 10 publications

References 28 publications

Analyzing Distributed Vibrating Sensing Technologies in Optical Meshes

Analyzing Distributed Vibrating Sensing Technologies in Optical Meshes

Tolerance of 16-Channel Dense Wavelength Division Multiplexing System to Fibre Dispersion and Four-Wave Mixing under Varying Capacities and Channel Spacing

Digital backpropagation based on binary logarithmic step size distribution for fibre non‐linearity compensation

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