A Data Rate- and Modulation Format-Independent Packet-Switched Optical Network Test-Bed

Brunina, Daniel; Lai, Caroline P.; Bergman, Keren

doi:10.1109/lpt.2011.2179642

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…Due to carrier density variations, saturation effects, and inter-channel nonlinear effects in the SOA, the multi-wavelength packets suffer from significant waveform distortion under switching. As a result, the power penalties measured in this experiment are higher than those observed in [19]. The observed power penalty (BER at ) for twenty-five wavelengths is also recorded in Fig.…”

Section: B 4 4 Photonic Switching Node Implemented On a Modular Optisupporting

confidence: 47%

“…Unfortunately, as a result of the complicated modulation and demodulation schemes, the limited durability of the required devices precludes the use of such a system in large-scale computing environments. The authors of [19] have experimentally demonstrated packet switching using both 8 40-Gb/s on-off keying (OOK) and differential-phase-shiftkeying (DPSK) through an optical network testbed. However, the 4 4 switch architecture used suffers from internal blocking, limiting its effective switching capacity.…”

Section: B 4 4 Photonic Switching Node Implemented On a Modular Optimentioning

confidence: 99%

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Next-Generation Optically-Interconnected High-Performance Data Centers

Zhang

Wang

Bergman

2012

J. Lightwave Technol.

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Abstract-The communication requirements imposed by the unabated growth in both the size and computational density of modern data centers will soon outpace the fundamental capabilities of conventional electronic interconnection networks. Optical interconnects represent a potentially disruptive technology that can simultaneously satisfy the throughput, latency, and energy demands of these next-generation systems. In this paper, we propose an end-to-end photonic networking platform for future optically-interconnected data center networks. A reconfigurable hybrid photonic network building block and a protocol-agnostic optical network interface comprise the key elements of our proposed system. A modular optical switch fabric prototyping platform is designed and implemented to support a wide variety of potential photonic technologies. We successfully demonstrate nanosecond-scale optical packet-switching at 1-Tb/s per port (40-Gb/s s) through our prototype, configured as a 4 4 switch, and confirm error-free transmission across all wavelengths. In order to flexibly allocate appropriate bandwidth for heterogeneous applications, we further implement and evaluate a novel wavelength-reconfigurable optical packet-and circuit-switch by utilizing our optical switch platform. Finally, we detail our implementation of an optical network interface card (O-NIC) designed to bridge the gap between the well-established protocol layers utilized in current networks and the physical layer of the proposed photonic networks and demonstrate its functionality by the streaming of high-definition video through the end-to-end optical network.

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Section: B 4 4 Photonic Switching Node Implemented On a Modular Optisupporting

confidence: 47%

Section: B 4 4 Photonic Switching Node Implemented On a Modular Optimentioning

confidence: 99%

Next-Generation Optically-Interconnected High-Performance Data Centers

Zhang

Wang

Bergman

2012

J. Lightwave Technol.

Self Cite

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“…The FPGA contains the routing control logic, which allows the network to be reconfigured to realize diverse network topologies. The SOAs act as optical on/off gates, configured in a broadcast-and-select manner, to enable nanosecond switching of broadband, high data-rate messages [28].…”

Section: Optical Network Test-bedmentioning

confidence: 99%

Resilient Optically Connected Memory Systems Using Dynamic Bit-Steering [Invited]

Brunina

Lai

Liu

et al. 2012

J. Opt. Commun. Netw.

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Abstract-Resilience is becoming an increasingly critical performance requirement for future large-scale computing systems. In data center and high-performance computing systems with many thousands of nodes, errors in main memory can be a significant source of failures. As a result, large-scale memory systems must employ advanced error detection and correction techniques to mitigate failures. Memory devices are primarily designed for density, optimizing memory capacity and throughput, rather than resilience. A strict focus on memory performance instead of resilience risks undermining the overall stability of next-generation computers. In this work, we leverage an optically connected memory system to optimize both memory performance and resilience. A multicast-capable optical interconnection network replaces the traditional electronic bus between a processor and its main memory, allowing for a novel error-correction technique based on dynamic bit-steering. As compared to an electronically connected approach, we demonstrate significantly higher memory bandwidths and reduced latencies, in addition to a 700× improvement in resilience.

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