Physical Layer Performance of Multi-Band Optical Line Systems Using Raman Amplification

Cantono, Mattia; Ferrari, Alessio; Pilori, Dario; Virgillito, Emanuele; Augé, Jean-Luc; Curri, Vittorio

doi:10.1364/jocn.11.00a103

Cited by 23 publications

(5 citation statements)

References 25 publications

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“…However, the conditions considered in that work (number of WDM channels, pulse shaping filter) are significantly different from modern ultra-wide-band scenarios, which may reduce the application of those results over such modern scenarios. On the other hand, recent experimental demonstrations of coherent transmission well beyond the PMD coherence bandwidth [19][20][21][22], have shown a substantial agreement between models and measurements. This suggests that the ME, at least for transmission of coherent signals over long dispersion-uncompensated links, can be valid also for wide optical bandwidths, and, consequently, we infer that PMD plays a negligible role in NLI generation.…”

Section: Introductionmentioning

confidence: 89%

Observing the effect of polarization mode dispersion on nonlinear interference generation in wide-band optical links

Pilori¹,

Cantono²,

Ferrari³

et al. 2019

OSA Continuum

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With the extension of the spectral exploitation of optical fibers beyond the Cband, accurate modeling and simulation of nonlinear interference (NLI) generation is of the utmost performance. Models and numerical simulation tools rely on the widely used Manakov equation (ME): however, this approach when considering also the effect of polarization mode dispersion (PMD) is formally valid only over a narrow optical bandwidth. In order to analyze the range of validity of the ME and its applicability to future wide-band systems, we present numerical simulations, showing the interplay between NLI generation and PMD over long dispersion-uncompensated optical links, using coherent polarization division multiplexing (PDM) quadrature amplitude modulation (QAM) formats. Using a Monte-Carlo analysis of different PMD realizations based on the coupled nonlinear Schrödinger equations, we show that PMD has a negligible effect on NLI generation, independently from the total system bandwidth. Based on this, we give strong numerical evidence that the ME can be safely used to estimate NLI generation well beyond its bandwidth of validity that is limited to the PMD coherence bandwidth.

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Section: Introductionmentioning

confidence: 89%

Observing the effect of polarization mode dispersion on nonlinear interference generation in wide-band optical links

Pilori¹,

Cantono²,

Ferrari³

et al. 2019

OSA Continuum

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“…D'Amico et al [23] evaluated the quality of transmission (QoT) in C + L-band systems and concluded that the degradation in generalized signal-to-noise ratio (GSNR) is related to SRS. Mitra et al [25] employed an optical SNR (OSNR) model considering ISRS as well as amplified spontaneous emission (ASE) noise, which is generated by the amplifiers in the C + L-bands, and Cantono et al [26] concluded that the application of the generalized Gaussian noise (GGN) model is the most appropriate solution for the prediction of QoT of wideband optical line systems.…”

Section: Related Workmentioning

confidence: 99%

Migration of elastic optical networks to the C + L-bands subject to a partial upgrade of the number of erbium-doped fiber amplifiers

Hosseini¹,

Miguel²,

Álvarez³

et al. 2023

J. Opt. Commun. Netw.

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Space division multiplexing (SDM) and band division multiplexing (BDM) are considered promising technologies to increase the capacity of optical transport networks. The progressive shortage of available dark fibers and the immaturity of multicore and multimode fibers for multichannel transmission induce network operators to postpone the process of capacity enhancement through SDM. Therefore, capacity increase revolves around BDM by lighting up at least the L-band of the already installed optical fiber infrastructure, which is a practical solution in the short to middle term. However, L-band activation requires the upgrade of network components such as erbium-doped fiber amplifiers (EDFAs). To manage the imposed cost while leveraging the L-band, a network can be partially rather than fully migrated in a single step by upgrading just a subset of the fibers and thus a subset of EDFAs to operate in the C+L-bands. In this paper, the focus is set on determining which fibers in the network should be upgraded to exploit the L-band, subject to a constraint on the maximum number of EDFAs to be upgraded, and analyzing its impact on network performance when facing dynamic traffic in terms of the blocking ratio. To this end, three heuristic algorithms, each pursuing a different objective, and two of them based on an integer linear programming (ILP) formulation, are proposed for the network planning to identify which fibers to upgrade. Simulation results demonstrate that, thanks to the use of these heuristics, the upgrade of a partial set of links to the C+L line system is a viable solution for network operators to circumvent the huge cost associated with migrating the full network. For instance, we demonstrate that a strategic partial upgrade using the proposed methods, subject to upgrading a maximum of 60% of the EDFAs, can significantly boost the supported traffic load in the examined topologies, ranging from 175% to 322%, when compared to the non-upgraded network.

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“…By using all the available bands between the O-band to the Lband (namely from 1260 nm to 1625 nm), the optical bandwidth can be increased by a factor of 10, compared to conventional C-band system. However, some challenges arise when considering muti-band transmission related to the development of key network/system components such as transceivers, optical amplifiers, optical filters and configurable optical switches (ROADMs) [2,[31][32][33][34][35]. Hence, multi-band transmission systems still present low maturity but maximize the return on investment of already deployed optical infrastructure.…”

Section: C4 Exploiting the Spectral Dimension: Multi-band Transmissionmentioning

confidence: 99%

Programmable disaggregated multi-dimensional S-BVT as an enabler for high capacity optical metro networks

Nadal

Fàbrega

Moreolo

et al. 2021

J. Opt. Commun. Netw.

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To meet the requirements of 5G high capacity optical metro networks, a programmable disaggregated multi-dimensional sliceable bandwidth/bitrate variable transceiver (S-BVT) is proposed. Specifically, transceiver multi-dimensionality is presented exploiting spatial, polarization and spectral information as a solution to support network capacity and bandwidth scaling 5G requirements. Space division multiplexing is implemented by considering a 19-core multicore fiber (MCF) enabling capacity scaling with the number of cores. Whereas polarization division multiplexing (PDM) is assessed enabling 50% spectral saving by considering two orthogonal polarization components. Finally, by the implementation of multi-band transmission systems the optical bandwidth can be increased by a factor of 10, compared to a conventional C-band system. In this last two cases, the existing spectrum and network infrastructure can be reused bringing new capabilities. In particular, in this work multi-band transmission is assessed by exploiting C-band and L-band. Additionally, disaggregation is also addressed at the transceiver level in order to enhance network flexibility, avoiding vendor lock-in, while achieving efficiency and cost reduction. Disaggregation enables assembling open components, devices and sub-systems into optical infrastructures and networks. On the other hand, the adoption of the software defined networking (SDN) paradigm enables system/network programmability and reconfigurability promoting an efficient use of the multi-dimensional network resources. Therefore, in this work, we analyze and experimentally demonstrate different S-BVT advanced functionalities suitable to support stringent network requirements of 5G. These capabilities include rate/distance adaptability, programmability/configurability, disaggregation and multi-dimensionality. Different network scenarios have been considered to assess the S-BVT functionalities, enabling Tb/s optical transmission.

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Physical Layer Performance of Multi-Band Optical Line Systems Using Raman Amplification

Cited by 23 publications

References 25 publications

Observing the effect of polarization mode dispersion on nonlinear interference generation in wide-band optical links

Observing the effect of polarization mode dispersion on nonlinear interference generation in wide-band optical links

Migration of elastic optical networks to the C + L-bands subject to a partial upgrade of the number of erbium-doped fiber amplifiers

Programmable disaggregated multi-dimensional S-BVT as an enabler for high capacity optical metro networks

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