A Novel Two-Layer Passive Optical Interconnection Network for On-Chip Communication

• Published in: Journal of lightwave technology Vol. 32; no. 9; pp. 1770 - 1776
• Main Authors: Chen, Ke, Gu, Huaxi, Yang, Yintang, Fan, Dongrui
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.05.2014; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Circuit properties; Computer architecture; Couplers; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Fabrics; Inter-layer coupler; Interconnected networks; Miscellaneous; network-on-chip; Networks and services in france and abroad; Optical and optoelectronic circuits; Optical fiber communications; optical interconnect; Optical interconnections; Optical telecommunications; Optical waveguides; Organization and planning of networks (techniques and equipments); passive network; Ports (Computers); Product introduction; Switches; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Teleprocessing networks. Isdn; Interconnection network; network-on-chip; Modular design; Scalability; Frequency allocation; Network architecture; optical interconnect; Wavelength division multiplexing; Inter-layer coupler; Passive optical network; System on a chip; passive network; Spatial multiplexing; Passive networks; Optical fiber network; Integrated circuit; Insertion loss; Optical fiber communication; Waveguide junction; Comparative study; Optical interconnection
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2014.2311119

Passive optical interconnection network (OIN) plays a key role in optical Network-on-Chip (ONoC) architecture. Existing passive OINs based on wavelength division multiplexing (WDM) are popularly employed. However, the scalability of these passive OINs is limited by the number of wavelengths and large insertion loss induced by the waveguide crossings. In this paper, we propose a novel Passive OIN based on two-layer architecture, POINT, for ONoC architecture. POINT leverages space division multiplexing (SDM) to assist WDM in eliminating blocking. The inter-layer communication in POINT relies on the inter-layer coupler, which contributes to reduce crossing losses. POINT features a modular and scalable design, in which the proposed SDM-based cell (SBC) is used as the basic building block to construct POINT with efficient wavelength assignment. Furthermore, SBCs of different sizes provide different options for constructing POINT. Comparisons with existing passive OINs confirm that POINT can provide an optimal choice with the balance between the number of wavelengths, area overhead, and insertion loss for the same size.