Optical interconnects for neural and reconfigurable VLSI architectures

Fey, Dietmar; Erhard, Werner; Gruber, Matthias; Jahns, Jürgen; Bartelt, Hartmut; Grimm, Guido; Hoppe, L.; Sinzinger, Stefan

doi:10.1109/5.867697

Cited by 43 publications

(14 citation statements)

References 29 publications

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“…The high aggregate bandwidth and channel density achievable by optical interconnects (OIs) make them ideal replacement for electrical interconnection schemes. Optical interconnects potentially have low power consumption, and can facilitate the development of radically novel designs for VLSI architectures including heterogeneous multiprocessor systems, and highly parallel computing systems [3][4][5] .…”

Section: Introductionmentioning

confidence: 99%

Analysis of optical channel cross talk for free-space optical interconnects in the presence of higher-order transverse modes

et al. 2005

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-We analyse the effect of crosstalk noise on the performance of free space optical interconnects (FSOIs). In addition to "diffraction-caused" crosstalk, we consider the effect of "stray-light" crosstalk noise which, to the best of our knowledge, has not been addressed previously. Simulations were performed on a microlens based FSOI system using the modal composition and beam profiles experimentally extracted from a commercial Vertical-Cavity Surface-Emitting Laser. We demonstrate that this crosstalk noise introduces significant degradation to interconnect performance, particularly for multi-transverse mode laser sources. A simple behavioural model is also developed which accurately approximates the crosstalk noise for a range of optical sources and interconnect configurations.

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Section: Introductionmentioning

confidence: 99%

Analysis of optical channel cross talk for free-space optical interconnects in the presence of higher-order transverse modes

et al. 2005

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“…The imbalance between satisfying on-chip computing power and insufficient off-chip short-distance communication performance has lead to an interconnect crisis in microelectronics [2]. Despite their reliability, simplicity, and low cost, electrical interconnects have fundamental technical challenges including reduced power requirements, reduced transmission latency, and greater interconnect density, which prevent them from being used in high-capacity interconnects.…”

Section: Introductionmentioning

confidence: 99%

High-speed (2.5 Gbps) reconfigurable inter-chip optical interconnects using opto-VLSI processors

Aljada¹,

Alameh²,

Lee³

et al. 2006

Opt. Express

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Reconfigurablele optical interconnects enable flexible and highperformance communication in multi-chip architectures to be arbitrarily adapted, leading to efficient parallel signal processing. The use of Opto-VLSI processors as beam steerers and multicasters for reconfigurable interchip optical interconnection is discussed. We demonstrate, as proof-ofconcept, 2.5 Gbps reconfigurable optical interconnects between an 850nm vertical cavity surface emitting lasers (VCSEL) array and a photodiode (PD) array integrated onto a PCB by driving two Opto-VLSI processors with steering and multicasting digital phase holograms. The architecture is experimentally demonstrated through three scenarios showing its flexibility to perform single, multicasting, and parallel reconfigurable optical interconnects. To our knowledge, this is the first reported high-speed reconfigurable N-to-N optical interconnects architecture, which will have a significant impact on the flexibility and efficiency of large shared-memory multiprocessor machines.

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“…The high aggregate bandwidth and channel density achievable by optical interconnects (OIs) make them an ideal replacement for electrical interconnection schemes. Optical interconnects potentially have low power consumption, and can facilitate the development of novel designs for VLSI architectures, including heterogeneous multiprocessor systems and highly parallel computing systems [3][4][5]. Recent developments in the integration of Vertical-Cavity Surface-Emitting Laser (VCSEL) arrays and photodetector arrays with CMOS electronic circuitry have increased the practical potential of optical interconnects [6,7].…”

Section: Introductionmentioning

confidence: 99%

Minimising crosstalk in microchannel free-space optical interconnects with the presence of higher order modes

2007

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We investigate the combined effect of the diffraction-caused crosstalk noise (DCCN) and the stray-light crosstalk noise (SLCN) on the performance of FSOI system. A numerical simulator was employed in this study to investigate OI channel design. We determine that there exists an optimal focal length, which maximises the signal-to-noise ratio (SNR) by minimising the combined effects of DCCN and SLCN. For the fundamental mode, the optimal focal length is approximately 750µm; for both LG 01 and LG 10 modes, the optimal focal length occurs between f = 650 µm and f = 700 µm, depending on the interconnection distance and array pitch.

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Optical interconnects for neural and reconfigurable VLSI architectures

Cited by 43 publications

References 29 publications

Analysis of optical channel cross talk for free-space optical interconnects in the presence of higher-order transverse modes

Analysis of optical channel cross talk for free-space optical interconnects in the presence of higher-order transverse modes

High-speed (2.5 Gbps) reconfigurable inter-chip optical interconnects using opto-VLSI processors

Minimising crosstalk in microchannel free-space optical interconnects with the presence of higher order modes

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