Dimensioning of 112G Optical-Packet-Switching-Based Interconnects for Energy-Efficient Data Centers

Abstract

International audienceWe 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 bit rate of the intra-data-center links up to 112 Gbit/s. The analysis focuses on pulse-amplitude modulation (4 and 8 PAM), where a pre-distortion mechanism is introduced and three types of optical receivers are taken into account. Possible dispersion of device characteristics is taken into account. The single-stage system should enable us to connect 48 servers using 8 PAM and semiconductor-optical amplifier (SOA)-PIN in conjunction with a 62.5 GHz grid. In the two-stage configuration, this number increases up to 1488

Computational Model and Parameter Extraction of High Speed Semiconductor Optical Amplifier Space Switches

“…Optical Amplifier Space Switches T. Sutili¹, P. Rocha¹, Ernesto M. M. Barrientos 1,2 , A. C. Bordonalli 1 , C. M. Gallep 3 , and E. Conforti¹, routing [10], and carrier wavelength reusing [11], [12]. Furthermore, its integrability enables the implementation of logic gates [13]- [15], optical adders and subtractors [16], memory modules [17], optical buffers [18]]-[ [20], optical demultiplexers [21], and wavelength selectors [22].…”

“…In Data Centers (DCs) optical packet switching (OPS) achieves latencies up to 25 ns, representing a clear improvement in comparison with the 90 ns typically introduced by equivalent all-electrical switches [1]. Complementarily, all-optical interconnects provide power consumption reduction [2], [3], cooling systems simplification and effortless network expansion.…”