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We experimentally study the polarization properties of the outputs of different open-cavity Raman fiber lasers based on spun fiber and a highly polarized pump, demonstrating controlled output polarization and improved threshold.
We experimentally analyze the impact of front-FBG reflectivity in ultra-long Raman laser amplifiers performance, showing Q-factor penalties in excess of 1 dB for FBG reflectivities above 10% in a 30 GBaud DP-QPSK transmission system.
Distributed Raman amplification has different roles to play in combination with of a range of potential solutions to deal with the nonlinear Shannon limit. Here, we will cover issues such as asymmetry optimisation for optical-phase conjugation nonlinear compensation, the combination of optimised distributed amplification with digital nonlinear compensation techniques and the challenges of adopting...
We compared the energy efficiency of Multi-Layer Bypass and Direct-Bypass On-Off design under daily traffic variations in 100G and 40G networks. Housing power contribution limits the energy savings achievable by On-Off dynamics.
We investigate how the WSS port-count requirement scales with traffic, transmission technologies, fiber types and amplification schemes in future WSONs. The highest benefits come with the Hybrid-EDFA implementation.
We compare different energy-aware network design strategies that adapt network resources utilization to traffic variations. We show how to achieve, without extra devices, up to 26% energy savings with respect to a 100Gb/s static network.
We experimentally demonstrate extremely high ODN optical power budget in self-coherent reflective PON at 1.25 Gbit/s (upstream), allowing more than 38 dB attenuation in the ODN after propagation in 80 km installed fibers. This was obtained by optimizing R-SOA parameters at the ONU, (optional) Faraday rotation and DSP at the OLT.
We investigate on the uncooled RSOA driving parameters in reflective-PONs, focusing on an upstream path at 1.25 Gbit/s and binary modulation. We show how the optimal values change using direct-detection or self-coherent receivers. We also address operating temperature dependence issues.
Some of the proposed NG-PON2 architectures encompass coherent receivers. In this scenario, we investigate the use of commercial DFB lasers, rather than more expensive ECL, showing negligible penalty for 40 Gbps PM-QPSK.
A Wavelength-Aware approach for Translucent design and dynamic routing is presented. Compared to the Wavelength-UnAware worst-case design scenario, up to 100% reduction on OEO interfaces has been found.
We present a novel design procedure for translucent optical networks. Regenerating nodes are selected via an Impairment-Aware ILP formulation exploiting the so-called “connectivity graph”.
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