Topic
Wavelength-division multiplexing
About: Wavelength-division multiplexing is a research topic. Over the lifetime, 25059 publications have been published within this topic receiving 332027 citations. The topic is also known as: WDM.
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26 Mar 2000
TL;DR: An efficient and general graph-theoretic model (the wavelength-graph (WG) has been proposed which enables solution of the static routing and wavelength assignment (RWA) problems in multihop wavelength routing (WR) wavelength division multiplexing (WDM) networks simultaneously, and-as a unique feature-it optimises the optical layer jointly with the electrical one.
Abstract: An efficient and general graph-theoretic model (the wavelength-graph (WG)) has been proposed which enables solution of the static routing and wavelength assignment (RWA) problems in multihop wavelength routing (WR) wavelength division multiplexing (WDM) networks simultaneously, and-as a unique feature-it optimises the optical layer jointly with the electrical one. Based on the proposed WG model the problem has been formulated as an integer linear program (ILP), solved by stochastic algorithms improved by simple heuristics. The topology of the physical layer, the type of each node (e.g., OADM, OXC or EXC), the number of available wavelengths per link and the capacity of each wavelength-channel are assumed given with the aggregated traffic demand of each node-pair. The output of the optimisation is the system of wavelength paths, light paths and semi-light paths. The objective of the optimisation is to reduce resource usage at upper (electrical) layers, subject to the constrained amount of capacity of each wavelength and a limited number of wavelengths. Although the problem to be solved is NP-hard, all methods proposed give a result in a very short time.
66 citations
TL;DR: In this paper, single-channel transmission at 320 Gb/s was demonstrated over a record length of 200 km of nonzero-dispersion fiber using pseudolinear transmission and distributed Raman amplification.
Abstract: Single-channel transmission at 320 Gb/s is demonstrated over record length of 200 km of nonzero-dispersion fiber. Typical terrestrial amplifier spacing of 100 km is achieved by using pseudolinear transmission and distributed Raman amplification. Stable semiconductor electroabsorption modulators are used in the transmitter, demultiplexer, and clock recovery, and uncorrelated multiplexing is employed in the OTDM transmitter.
66 citations
21 Mar 2010
TL;DR: In this paper, the authors demonstrate ten-channel wavelength-division-multiplexed long-haul optical networking of 28-Gbaud PDM 16-QAM signals on a 50-GHz grid (spectral efficiency of 4 b/s/Hz).
Abstract: We demonstrate ten-channel wavelength-division-multiplexed long-haul optical networking of 28-Gbaud PDM 16-QAM signals on a 50-GHz grid (spectral efficiency of 4 b/s/Hz). We achieve transmission over 1,200 km of ultra-large-area fiber, including three wavelength-selective-switch passes.
66 citations
TL;DR: In this paper, the transmission of many wavelength-division-multiplexed (WDM) channels through a cascade of erbium-doped fiber amplifiers (EDFA) in both long-distance links and ring-based networks is analyzed.
Abstract: We analyze the transmission of many wavelength-division-multiplexed (WDM) channels through a cascade of erbium-doped fiber amplifiers (EDFA) in both long-distance links and ring-based networks. For a megameter long-distance system, optimal operating conditions are found for achieving a high signal-to-noise ratio (SNR) per channel with as small an SNR differential as possible between 20 WDM channels spaced 0.5 nm apart. Critical issues addressed in this paper include: (a) the non-uniformity of the EDFA gain with wavelength: (b) the link loss between amplifiers; (c) the small-signal gain per amplifier; and (d) the input signal power. >
66 citations
20 Mar 2016
TL;DR: It is shown that the use of MCF for power efficient ultra-high capacity long haul transmission using 12-core fiber and power equivalent of a single pump laser is feasible.
Abstract: We demonstrate the use of MCF for power efficient ultra-high capacity long haul transmission. Feasibility of 105.1 Tb/s transmission over 14,350 km is shown using 12-core fiber and power equivalent of a single pump laser.
66 citations