Fat‐tree‐based optical networks‐on‐chip with WDM: crosstalk noise exploiting. Issue 2 (1st April 2019)

• Record Type: Journal Article
• Authors: Zhang, Jingping; Xie, Yiyuan; Wang, Shujian; Ye, Yichen; Liu, Yuzhu; Pan, Gaofeng; Liu, Yong; Zhang, Jiliang
• Is Part Of: IET optoelectronics. Volume 13:Issue 2(2019)
• Page Start: 85
• Page End: 93
• Publication Date: 2019-04-01
• Subjects: network-on-chip -- wavelength division multiplexing -- optical crosstalk -- integrated optoelectronics -- optical links -- multiwave mixing -- trees (mathematics) -- optical fibre networks -- network routing; wavelength division multiplexing -- high-power consumption -- intrinsic crosstalk noise -- formal systematical exploiting -- optical signal-to-noise ratio -- optical turnaround router -- input optical signal power equals -- WDM-based ONoC -- arbitrary fat-tree-based ONoC -- fat-tree-based optical networks-on-chip -- crosstalk noise exploiting -- multiprocessor systems-on-chip -- nonlinear four-wave mixing crosstalk noise -- worst-case crosstalk noise -- worst-case OSNR optical link -- processor cores; Optoelectronics -- Periodicals; 621.36
• DOI: 10.1049/iet-opt.2018.5070
• Languages: English
• ISSNs: 1751-8768

Abstract

Abstract : Wavelength division multiplexing (WDM) technology as an extension of optical networks‐on‐chip (ONoCs) performance, can be applied to further overcome shortages of low bandwidth and high‐power consumption in multiprocessor systems‐on‐chip. Nevertheless, WDM‐based ONoCs (ONoCs_W) can encounter performance degradation and network scalability constraints because of its power loss and intrinsic crosstalk noise, especially the non‐linear four‐wave mixing crosstalk noise. Here, a formal systematical exploiting for worst‐case crosstalk noise and optical signal‐to‐noise ratio (OSNR) in arbitrary fat‐tree‐based ONoCs with WDM (FONoCs_W) is proposed. Meanwhile, the worst‐case OSNR optical link candidates are identified. To verify the proposed analysis method, FONoCs_W employing an optical turnaround router with WDM (WOTAR) is used for case study. The study results demonstrate that crosstalk noise significantly diminishes OSNR and restricts scalability of FONoCs_W. For instance, when input optical signal power equals 0 dBm in worst case, the average OSNR is −9.47 dB, the mean power of crosstalk noise for eight wavelengths is slightly greater than that of signal when the number of processor cores is 64; when it equals to 128, the average OSNR is −34.37 dB, decreased by 24.90 dB compared with the network with 64 processor cores.