Bárbara Pilar Dumas Feris

Brest National Engineering School | ENIB

We analyze POPI+ and Tranfer POPI, two interconnects derived from POPI (Passive-Optical-Pod Interconnect), designed for small energy-aware data centers including server-turn-on/off strategies. We investigate a new control network based on a star coupler for ensuring inter-rack communications for both architectures. We also evaluate their ability to...

La consommation d'énergie des centres de données est un enjeu majeur. Leurs communications internes représentent près du quart de cette consommation. Les technologies de commutation optique ont en principe une meilleure efficacité énergétique que les solutions actuelles. Ce travail porte sur les réseaux optiques en mode paquet pour des centres de d...

We present the dimensioning of an optical packet switching network for energy-efficient intra-data-center connections. Our approach relies on one or two interconnection stages derived from the time-wavelength-interleaved network concept and relying on fast wavelength-tunable lasers. We compare several options by numerical simulation to increase the...

With the emergence of the Future Internet and the dawning of new IT models such as cloud computing, the usage of data centers (DC), and consequently their power consumption, increase dramatically. Besides the ecological impact, the energy consumption is a predominant criterion for DC providers since it determines the daily cost of their infrastruct...

We analyze the recently proposed Extended-Passive-Optical-Pod Interconnect (e-POPI), designed for small energy-aware data centers, including server-turn-on/off strategies. We investigate several options to increase up to 56 Gbit/s the bit rate of e-POPI’s links by the use of Pulse Amplitude Modulation (4 or 8 PAM) considering three types of receive...

We compare by numerical simulation several options to increase up to 112 Gbit/s the bit rate used for intra-data-center interconnections relying on the recently proposed Passive Optical Pod Interconnect (POPI) architecture, itself derived from the TWIN (Time-Wavelength-Interleaved Network) concept. The motivation for such bit rate is the need to mi...

We compare two all-optical data-center interconnects, POPI (Passive Optical Pod Interconnect) and POITR (Passive Optical Interconnect at Top of the Rack). We show that POPI is better in terms of link power budget and thus more suited to an increase of modulation format complexity. An extension of this solution is proposed by the use C and L transmi...

With the emergence of the Future Internet and the dawning of new IT models such as cloud computing, the usage of data centers (DC), and consequently their power consumption, increase dramatically. Besides the ecological impact, the energy consumption is a predominant criteria for DC providers since it determines the daily cost of their infrastructu...

In this paper, we present an original work on sub-wavelength optical switching performed over a coherent multi-band orthogonal frequency-division multiplexing (MB-OFDM) super-channel operating at 100 Gbps. After having demonstrated that dual-polarization MB-OFDM (DP-MB-OFDM) is as efficient as single-carrier dual-polarization quaternary phase shift...

For the first time to our knowledge, power transient control in hybrid amplifier (HA) cascades is analyzed by means of numerical simulation. Four hybrid configurations are investigated, considering distributed fiber Raman amplifiers (DFRAs) in both backward and forward pumping schemes, in front of and behind an erbium doped fiber amplifier (EDFA)....

Pumps of a Distributed Fiber Raman Amplifier (DFRA) built over Non-Zero Dispersion Shifted Fiber (NZ-DSF), can generate FWM waves which could degrade the flatness of the amplifier gain profile. In this paper a rigorous approach based on a Genetic Algorithm (GA) and a Message Passing Interface (MPI) strategy have been used, in order to design a flat...

In this work the power transient control in cascades of Hybrid Amplifiers (HAs) is investigated. Two hybrid configurations are considered: a backward pumped DFRA preceding an EDFA and a forward pumped DFRA ahead of an EDFA. In both cases the EDFA in forward pumped. When 17 out of 20 channels are dropped/added, the steady state power excursions of t...

WRONs often involve channel drop/add procedures affecting the transmission quality due to the introduction of power excursions by the optical amplifiers. In this work, the Hybrid Amplifier (HA) transient response under WDM channel drop/add scenarios is analyzed by means of numerical simulation. When 17 out of 20 channels are dropped/added, the HA t...

A dynamic lightpath allocation algorithm that considers the impact of Raman amplification on the quality of the signal is proposed. To do so, an exhaustive theoretical model that includes fiber attenuation, Rayleigh scattering, stimulated Raman scattering (gain and depletion of channels and pumps) and spontaneous Stokes and anti-Stokes scattering c...