Scalability analysis methodology for passive optical interconnects in data center networks using PAM

OPTICS COMMUNICATIONS

卷:403

Article

Lin, R.^1,2  Szczerba, Krzysztof^3,5  Agrell, Erik⁴  Wosinska, Lena²  Tang, M.¹  Liu, D.¹  Chen, J.² 

[1] HUST, Sch Opt & Elect Informat, Next Generat Internet Access Natl Engn Lab NGIA, 1037 Luoyu Rd, Wuhan, Hubei, Peoples R China

[2] KTH Royal Inst Technol, Sch Informat & Commun Technol, Electrum 229, Kista, Sweden

[3] Chalmers Univ Technol, Dept Microtechnol & Nanosci, Gothenburg, Sweden

[4] Chalmers Univ Technol, Dept Elect Engn, Gothenburg, Sweden

[5] Finisar Corp, Sunnyvale, CA USA

关键词: Data center networks;    Passive optical interconnect (POI);    Multi-level pulse amplitude modulation (M-PAM);    Scalability Top-of-rack (ToR);   

DOI  :  10.1016/j.optcom.2017.07.052

来源: Elsevier

【 摘 要 】

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. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free