In massivelyparallel computer systems for embedded real-time applications there are normally very high bandwidth demands on the interconnection network. Other important properties are time-deterministic latency and s...
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ISBN:
(纸本)0818675918
In massivelyparallel computer systems for embedded real-time applications there are normally very high bandwidth demands on the interconnection network. Other important properties are time-deterministic latency and services to guarantee that deadlines are met. In this paper we analyze how these properties vary with the design parameters for a passive optical star network, specifically when used in a massivelyparallel radar signal processing system. The aggregated bandwidth and computational power of the radar system are approximately 45 Gb/s and 100 GOPS, respectively. The analysis is focused on the medium access control protocol, called TD-TWDMA, for the time and wavelength multiplexed network. It is concluded that the proposed network is very well suited to this kind of signal-processing applications. We also present a new distributed slot-allocation algorithm with real-time properties.
A geometrical transformation changes the locations of image pixels in arbitrary ways. Such permutations of locations are useful for highly parallel communications systems. We discuss the usefulness of several specific...
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A geometrical transformation changes the locations of image pixels in arbitrary ways. Such permutations of locations are useful for highly parallel communications systems. We discuss the usefulness of several specific geometrical transformation setups. Important aspects are the use of macro- or micro-optical hardware, and also the distinction between SIMD and MIMD type of permutations.
The increasing demand for bandwidth and interconnection density to provide wide bandwidth services at reasonably low cost are rapidly exhausting capabilities of interconnection techniques currently employed in convent...
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ISBN:
(纸本)0818675918
The increasing demand for bandwidth and interconnection density to provide wide bandwidth services at reasonably low cost are rapidly exhausting capabilities of interconnection techniques currently employed in conventional wide bandwidth telecommunication switching equipment. In particular, a bottleneck occurs at the intra-system (that is, board-, shelf- and cabinet-level) backplane interconnections. In order to address this problem, a variety of optical interconnection schemes have been proposed. At Lucent Technologies Bell Laboratories, we have taken a systems approach in developing a Z-axis assembly process for producing flexible optical backplane interconnection circuits. This paper describes details of fabrication process and performance of new flexible optical circuits.
High performance shared memory multiprocessors demand extremely high internal bandwidth. optical interconnect has the potential to make this high bandwidth relatively inexpensive.
High performance shared memory multiprocessors demand extremely high internal bandwidth. optical interconnect has the potential to make this high bandwidth relatively inexpensive.
Diodes containing quantum well semiconductor structures can operate both as optical reflection modulators and optical detectors. They can be bonded in two-dimensional arrays to silicon electronic circuits, and allow h...
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Diodes containing quantum well semiconductor structures can operate both as optical reflection modulators and optical detectors. They can be bonded in two-dimensional arrays to silicon electronic circuits, and allow high-speed, high-density, low-power optical input/output. This emerging technology may enable new classes of opto-electronic systems that can take advantage of many previously unexploited features of optics for interconnection, and offers a new opportunity to relieve the growing problems of wiring in high-performance electronic systems.
A new way to dynamically control in-flight pulses in a wavelength division multiplexed (WDM) single-mode fiber system is presented in this paper This system functionally resembles an optical fiber ribbon cable, except...
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ISBN:
(纸本)0818675918
A new way to dynamically control in-flight pulses in a wavelength division multiplexed (WDM) single-mode fiber system is presented in this paper This system functionally resembles an optical fiber ribbon cable, except that all the bits pass on one fiber optic waveguide and that the bandwidth and bit temporal pulse alignment are much greater In a WDM fiber system, where pulses on different wavelength beams may cc-propagate in a single-mode fiber the cross phase modulation (CPM) effects caused by the nonlinearity of the optical fiber are unavoidable. In other words, pulses on different wavelength beams can interact with and affect each other through the intensity dependence of the refractive index of the fiber. using this phenomenon, through the introduction of a shepherd pulse at a separate wavelength, it is possible to manipulate, 'color', and control pulses on co-propagating beams. How this can be accomplished will be demonstrated in this paper.
optical local area networks (LANs) offer the high capacities needed to keep pace with the increasing demand of business users. There will be a need towards the broadband interconnection of LANs. An interconnection sch...
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optical local area networks (LANs) offer the high capacities needed to keep pace with the increasing demand of business users. There will be a need towards the broadband interconnection of LANs. An interconnection scheme for optical LANs via an optical cross-connected overlay, which takes full advantage of recent developments in the field of planar technology, is presented.
Several applications of optics in electronic systems are compared. Optics is good at dense storage, and optics will find a limitless application in providing high bandwidth access to various forms of dense optical sto...
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Several applications of optics in electronic systems are compared. Optics is good at dense storage, and optics will find a limitless application in providing high bandwidth access to various forms of dense optical storage. Use of rack-to-rack fiber interconnects is promising, and board-to-board optical interconnects are gaining acceptance for optical clock distribution at a few hundred megahertz. Gate-level optical interconnects, however, will not pay off because intricate wiring patterns are better handled electrically for short distances. Further, gate-level interconnection via waveguides is not nearly as flexible as the more mature metal approaches, and the alternative free-space optics approach does not support good gate density.
Potentially low-cost optical side-couplers embedded along a polymer optical fiber are demonstrated using etched micro-mirrors. Both serial and parallel mirror fabrication possibilities are discussed. Near uniform ligh...
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ISBN:
(纸本)0818679751
Potentially low-cost optical side-couplers embedded along a polymer optical fiber are demonstrated using etched micro-mirrors. Both serial and parallel mirror fabrication possibilities are discussed. Near uniform light distributions to as many as 256 such side-coupling ports along a single straight fiber were experimentally obtained. Various unidirectional and bi-directional all plastic array coupler concepts are presented. Some of them are experimentally demonstrated. Low-cost unidirectional and bi-directional optical data buses are proposed.
We review some of the relatively fundamental work in the area of optically interconnected digital computing systems. We cover comparisons of opticalinterconnections with other interconnection media in terms of energy...
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We review some of the relatively fundamental work in the area of optically interconnected digital computing systems. We cover comparisons of opticalinterconnections with other interconnection media in terms of energy and interconnection density, studies determining the optimal combination of optical and electrical interconnections that should be used, work on free-space optical interconnection architectures, complexity studies, and work on physical and logical system architectures and algorithms. We exclude work on devices, components, materials, and manufacturing.
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