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We present the first prototype of a real-time bandwidth-variable coherent muxponder aggregating multiple 10GigE clients onto a symbol-rate-variable PDM-QPSK optical signal. This technology enables optical transport with power consumption linearly proportional to the actual requested traffic.
We propose a simple semi-analytical model to predict the performance of transmission systems without in-line dispersion compensation and mixed fiber types. Comparing with numerical simulations we show that our model predicts the Q2 factor with an accuracy of 0.2 dB.
We compare set partitioned two-polarization 16QAM formats with conventional PDM-QPSK and PDM-8QAM formats by considering error correction coding. We particularly show that 128SP-16QAM appear as a competitive alternative to PDM-8QAM for spectrally efficient (>4 b/s/Hz) optical transmission systems using forward error-correction coding.
We compare the cost-efficiency of optical networks based on mixed datarates (10, 40, 100Gb/s) and elastic technologies. We show elastic network bring up to 37% lower cost, in particular for high loads and dynamic scenarios.
We propose and demonstrate a rate-adaptive burst-mode coherent receiver with ultra fast convergence time. We propose the concept of data rate adaptive optical packet networks and show its network advantages in terms of queuing delay reduction.
We propose a protocol enhancement to manage the power state of optoelectronic interfaces in automatically reconfigurable optical networks. For dynamic traffic scenarios 67% of energy savings have been estimated for the optoelectronic interfaces.
In this paper, we examine how typical transmission systems can be made tunable in datarate, up to 100 Gb/s, through modulation-format versatility. We investigate through extensive numerical simulations the available reach versus datarate, taking in particular into account the nonlinear interaction between channels in this mixed-format context. We show how these versatile transmission systems can be...
We investigate link restoration in optical networks carrying multiple data-rates. We compare rate-tunable opto-electronic interfaces (elastic) versus rate-specific (fixed) technologies and show the reconfiguration ability of elastic interfaces strongly reduces the required spare resources.
We propose a novel model for core optical networks combining benefits of transparent and opaque networks through variable channel spacing. We demonstrate increased capacity at limited energy cost through detailed transmission experiments and network planning.
We propose a network model based on format-versatile transceiver for data-rate tunability. We estimate each format's resistance to degradations and dimension a backbone network accordingly, yielding 20% savings on resources compared to single-rate networks.
We present simple reach estimators for 5 to 15 Gb/s NRZ channels in commonly deployed networks and assess the benefits of tunable data-rate in core optical networks through routing and resource allocation studies.
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