Five-port optical router for photonic networks-on-chip

Optoelectronic System Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, P. O. Box 912, Beijing 100083, China.
Optics Express (Impact Factor: 3.49). 10/2011; 19(21):20258-68. DOI: 10.1364/OE.19.020258
Source: PubMed


We experimentally demonstrate a spatially non-blocking five-port optical router, which is based on microring resonators tuned through the thermo-optic effect. The characteristics of the microring-resonator-based switching element are investigated to achieve balanced performances in its two output ports. The optical router is fabricated on the SOI platform using standard CMOS processing. The effective footprint of the device is about 440×660 μm2. The microring resonators have 3-dB bandwidths of larger than 0.31 nm (38 GHz), and extinction ratios of better than 21 dB for through ports and 16 dB for drop ports. Finally, 12.5 Gbps high-speed signal transmission experiments verify the routing functionality of the optical router.

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Available from: Lin Yang, Feb 26, 2014
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    • "Circuit-switching offers higher aggregate bandwidth compared to other switching techniques applicable in PNoC, by adopdting WDM technology[4]. Also, circuit swicthing offers more compact and scalable implementations[6]. Fig. 1 "
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    ABSTRACT: In Recent times many two-dimensional photonic NoC architectures have been proposed with laser sources. Such Photonic NoCs meet high-bandwidth requirements but at the cost of significant power consumptions. In this paper, we propose a low-power and low cost solution to photonic NoC. A 2-layer photonic NoC architecture with laser multiplexing has been designed using a separate ring waveguide layer towards realizing a 3D photonic NoC. This approach is first of its kind in designing high-performance and low-power Photonic NoC architecture. The design approach is scalable. The proposed design results in 75% reduction in the number of on-chip lasers and 50% reduction in power dissipation compared to recently reported results.
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    • "For example a 16 core, 16 node 4×4 mesh NoC architecture as shown in Fig.1. A bidirectional link between two adjacent routers Fig. 1: Two Dimensional Photonic mesh network is a combination of two unidirectional waveguides because there's no practical silicon-photonic circulator [5]. The most fundamental component of an NoC is the router node. "
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    ABSTRACT: The communication bandwidth and power consumption of network-on-chip (NoC) are going to meet their limits soon because of traditional metallic interconnects. Photonic NoC is emerging as a promising alternative to address these bottlenecks. Photonic routers and silicon-waveguides are used to realize switching and communication respectively. In this paper, we propose a non-blocking, low power, and high performance 5×5 photonic router design using silicon microring resonators(MRR). Mode-division-multiplexing (MDM) scheme has been incorporated along with wavelength-division-multiplexing (WDM) and time-division-multiplexing (TDM) in the router to increase the aggregate bandwidth 4× times, making it a suitable candidate for high performance NoC. The technique proposed here is the first of its kind to the best of our knowledge. The MDM based design permits multi-modal (here 2 modes) communication. As compared to a high-performance 45nm electronic router, the proposed router consumes 95% less power. Further the results show 50% less power consumption and 75% less insertion loss when compared to most recently reported photonic router results.
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    • "Ji's router [13], Cygnus router [14], and Poon's router [15]. We analyze the performance of different optical routers in a 16 16 photonic mesh network. "
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    ABSTRACT: We propose a universal method for constructing N-port nonblocking optical routers based on microring resonators. The topologies for five-, six-, seven-, and eight-port nonblocking optical routers are presented. As a case study, we compare the five-port optical router constructed by our method with the previously reported ones. The simulation results show that the mesh photonic network constructed by the proposed five-port optical routers has low insertion loss and high optical signal-to-noise ratio. Moreover, high-radix optical routers can be easily constructed by the proposed method, which can support more complicated and efficient network.
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