Performance analysis and optimization of wavelength routed (WR) and wavelength selected (WS) hybrid optical distributed network (ODN) for next generation passive optical network stage 2 (NG-PON2)
TL;DR: In this article, the optical launch power is optimized to abate the fiber nonlinearity and significantly enhances the performance of NG-PON2 at dynamic fiber reach for Alcatel 6912 Teralight Ultra 1625 commercial fiber specification.
Abstract: Next-generation passive optical network stage 2 (NG-PON2) supports the wavelength routed optical distributed network (WR-ODN), power splitter optical distributed network or wavelength-selected optical distributed network (WS-ODN) and hybrid of both the architecture configuration. NG-PON2 is world’s first multi-wavelength passive optical network (PON) standard. The fiber dispersion and nonlinearity degrades the performance of NG-PON2 severely. Fiber nonlinearity depends on the optical launch power and fiber reach. This paper focuses on maximizing the network performance and maximizing the number of simultaneous users with error-free performance by optimizing the optical launch power respectively at dynamic reach and differential reach. The optical launch power is optimized to abate the fiber nonlinearity and significantly enhances the performance of NG-PON2 at dynamic fiber reach for Alcatel 6912 Teralight Ultra 1625 commercial fiber specification. Furthermore, precise values of the optimum launch power for the dynamic fiber reach, for different NG-PON2 architecture, under industrial fiber specification is meticulously obtained. It is identified that irrespective of both, WR-ODN and WS-ODN architecture configuration, optimum launch power remains constant. Power budget is calculated for both, maximizing the performance and maximizing the simultaneous number of users at differential reach and dynamic reach of the NG-PON2.
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TL;DR: Recent advances in improving the performance of the optical link monitoring system, such as measurement accuracy, measurement speed, signal-to-noise (SNR) ratio, spatial resolution, and dynamic range, were investigated and compared to identify an ideal monitoring framework.
18 citations
01 Jan 2009
TL;DR: It is shown how requirements of low cost and low energy consumption can influence the choice of switching technologies as well as the overall network architecture.
Abstract: We review technologies and architectures for WDM optical IP networks from the viewpoint of capital expenditure and network energy consumption. We show how requirements of low cost and low energy consumption can influence the choice of switching technologies as well as the overall network architecture.
14 citations
TL;DR: The results show that the 4 × 20/20 Gbps PDM-EAM modulated signals over 100 km fiber distance at − 60 dBm RS and 70 dB PB are successfully transmitted under fiber non-linearities.
Abstract: Today’s access networks are in high demand to fulfill the high bandwidth requirement because of extensive improvement in high transmission rate applications for cloud computing, big data analytics, and other next-generation 5G smart applications. This exponential growth of high capacity and broadband access technologies comprise an essential trend in the development of a passive optical network (PON) access network. In this paper, 80/80 Gbps time wavelength division multiplexing PON (TWDM-PON) incorporating polarization division multiplexing (PDM) based Mach–Zehnder modulator (MZM) and electroabsorption modulator (EAM) techniques have been proposed. The performance of the system consisting of different polarized multiplexed modulation techniques is investigated in both downstream and upstream data transmission for variable transmission distance and received optical power in terms of bit error rate (BER), eye diagrams, power budget (PB) and receiver sensitivity. The results show that the 4 × 20/20 Gbps PDM-EAM modulated signals over 100 km fiber distance at − 60 dBm RS and 70 dB PB are successfully transmitted under fiber non-linearities. The proposed TWDM-PON system provides a next-generation long-reach access network from urban to rural areas.
12 citations
01 May 2020
4 citations
TL;DR: This work application of an optimized breadth-first search (BFS) algorithm to select a couple of link-and-node-disjoint shortest-path between the two most remote users within an optical access network showed that while the original BFS algorithm was 12.23 seconds that of the optimized BFS was 10.80 seconds, which means a reduction of 11.69 percent of the average computing time.
Abstract: This work consists in the application of an optimized breadth-first search (BFS) algorithm to select a couple of link-and-node-disjoint shortest-path between the two most remote users within an optical access network. Our results showed that while the average execution time of the original BFS algorithm was 12.23 seconds that of the optimized BFS was 10.80 seconds, which means a reduction of 11.69 percent of the average computing time. In future works we intend to apply the modified BFS algorithm to a generic optical network and evaluate its performance for different mesh size, node concentration and random link arrangement.
3 citations
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...Outras iniciativas de otimização do emprego dos recursos disponı́veis nas redes ópticas envolvem o aprimoramento da qualidade de serviço em ações de roteamento através do emprego de algoritmos genéticos [3], a definição do nı́vel ótimo da potência lançada na fibra para combater as não-linearidades, a dispersão do sinal e maximizar o número de usuários simultâneos [4] e também a virtualização das funções da rede de modo a potencializar o compartilhamento dos recursos da camada fı́sica [5]....
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References
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TL;DR: In this paper, the authors report measurements of frequency broadening due to self-phase modulation (SPM) in optical fibers, using single-mode silica-core fibers and mode-locked argon-laser pulses.
Abstract: We report measurements of frequency broadening due to self-phase-modulation (SPM) in optical fibers. The use of single-mode silica-core fibers and mode-locked argon-laser pulses leads to the simplest and cleanest measurements yet made of SPM. The qualitative features of the frequency spectrum are in good agreement with theoretical expectations. The experiment provides an independent measurement of ${n}_{2}$, the self-focusing coefficient. The results also point to some simple and useful techniques based on fibers for the measurement and analysis of mode-locked laser pulses.
824 citations
TL;DR: In this paper, the power limitations of light-wave systems were analyzed as a function of a number of wavelength-multiplexed channels and methods for scaling these results with changes in system parameters were presented.
Abstract: Optical nonlinearities in the context of lightwave systems limitations are described. The nature and severity of system degradation due to stimulated Raman scattering, carrier-induced phase noise, stimulated Brillouin scattering, and four-photon mixing are discussed. The system power limitations are plotted as a function of a number of wavelength-multiplexed channels. Methods for scaling these results with changes in system parameters are presented. >
787 citations
Book•
09 Oct 2020
TL;DR: In this article, the authors present a system of units for optical signal generation in WDM systems, and a software package for software packages for this system. But they do not discuss the software package itself.
Abstract: Preface. 1. Introduction. 2. Optical Signal Generation. 3. Signal Propagation in Fibers. 4. Nonlinear Impairments. 5. Signal Recovery and Noise. 6. Optical Amplifier Noise. 7. Dispersion Management. 8. Nonlinearity Management. 9. WDM Systems. 10. Optical Networks. Appendix A: System of Units. Appendix B: Software Package. Appendix C: Acronyms. Index.
292 citations
TL;DR: In this article, the authors review technologies and architectures for WDM optical IP networks from the viewpoint of capital expenditure and network energy consumption, and show how requirements of low cost and low energy consumption can influence the choice of switching technologies as well as the overall network architecture.
Abstract: We review technologies and architectures for WDM optical IP networks from the viewpoint of capital expenditure and network energy consumption. We show how requirements of low cost and low energy consumption can influence the choice of switching technologies as well as the overall network architecture.
245 citations
TL;DR: An up-to-date survey of hybrid fiber-wireless (FiWi) access networks that leverage on the respective strengths of optical and wireless technologies and converge them seamlessly is provided.
Abstract: This article provides an up-to-date survey of hybrid fiber-wireless (FiWi) access networks that leverage on the respective strengths of optical and wireless technologies and converge them seamlessly. FiWi networks become rapidly mature and give rise to new powerful access network solutions and paradigms. The survey first overviews the state of the art, enabling technologies and future developments of wireless and optical access networks, respectively, paying particular attention to wireless mesh networks and fiber to the home networks. After briefly reviewing some generic integration approaches of EPON and WiMAX networks, several recently proposed FiWi architectures based on different optical network topologies and WiFi technology are described. Finally, technological challenges toward the realization and commercial adoption of future FiWi access networks are identified.
237 citations