Scalability analysis methodology for passive optical interconnects in data center networks using PAM
Journal article, 2017

A framework is developed for modeling the fundamental impairments in optical datacenter interconnects, i.e., the power loss and the receiver noises. This framework makes it possible, to analyze the trade-offs between data rates, modulation order, and number of ports that can be supported in optical interconnect architectures, while guaranteeing that the required signal-to-noise ratios are satisfied. To the best of our knowledge, this important assessment methodology is not yet available. As a case study, the trade-offs are investigated for three coupler-based top-of-rack interconnect architectures, which suffer from serious insertion loss. The results show that using single-port transceivers with 10 GHz bandwidth, avalanche photodiode detectors, and quadratical pulse amplitude modulation, more than 500 ports can be supported.

Multi-level pulse amplitude modulation (M-PAM)


Top-of-rack (ToR)

Passive optical interconnect (POI)

Data center networks


R. Lin

Royal Institute of Technology (KTH)

Huazhong University of Science and Technology

Krzysztof Szczerba

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Erik Agrell

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

L. Wosinska

Royal Institute of Technology (KTH)

M. Tang

Huazhong University of Science and Technology

D. M. Liu

Huazhong University of Science and Technology

J. Chen

Royal Institute of Technology (KTH)

Optics Communications

0030-4018 (ISSN)

Vol. 403 283-289

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering



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