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检索条件"任意字段=Conference on All-Optical Communication Systems: Architecture, Control and Network Issues"

共 2524 条记录，以下是41-50 订阅

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Embedded real time control of optically amplified repeaters in broadband access networks

Embedded real time control of optically amplified repeaters ...

引用

conference on all-optical communication systems - architecture, control, and network issues III

作者： Stubbe, B Vaes, P Gouwy, L Coene, C Qiu, XZ Staelens, B Vandewege, J Slabbinck, H Martin, C VandeVoorde, I Univ. of Ghent (Belgium) Alcatel Telecom (Belgium)

ISBN: (纸本)0819426636

This paper presents the use of distributed, intelligent control and management in optically amplified repeaters. These optical repeater units (ORU's) are used in an optical access network. A Semiconductor optical Amplifier (SOA) has been used in the upstream direction because of the possibility of fast switching. The real time control platform consists of both a hard-and a software part. The software control is handled with the embedded control system FORTRESS developed by IMEC.

关键词： real time control embedded intelligence SOA optical repeater network management

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Photonic switch size limitations imposed by phase noise from semiconductor optical amplifiers

Photonic switch size limitations imposed by phase noise from...

引用

conference on all-optical communication systems: architecture, control and network issues

作者： Pires, JJO Univ Tecn Lisboa DEPT ELECT & COMP ENGN INST SUPER TECN P-1096 LISBON PORTUGAL

ISBN: (纸本)0819419788

A possible way of realizing large optical space switches is by interconnecting multiple 2 X 2 switching elements based on integrated semiconductor optical amplifiers (SOAs). In this paper, the switch size limitations are examined, giving a special emphasis to the phase noise, originated by SOAs. Using a DPSK direct detection scheme and multiple optical filters within the switching network, it is shown that the phase noise becomes the most restrictive factor, preventing to connect more than 200 switching elements, for a bit rate in the gigabit/s range.

关键词： Switches Switching Interference (communication) Semiconductor optical amplifiers optical amplifiers optical components optical filters Receivers Signal attenuation Matrices

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Optimal control of all optical communication soliton systems

Optimal control of all optical communication soliton systems

引用

conference on all-optical communication systems - architecture, control, and network issues II

作者： Khasilev, VY ROSTOV DON STATE UNIV ROSTOV NA DONU 344090RUSSIA

ISBN: (纸本)0819423211

Space, time and polarization photonic switching process in nonlinear Kerr-like media is described by the system of coupled nonlinear Schrodinger equations. New analytical solutions to these equations were obtained by means of modification of inverse scattering transform (IST) method. Matrix modification of the IST method is used to solve the problem of two-frequency spatial and temporal solitons. Some 'soliton spectral flashes' at sum and difference frequencies are discovered. It is shown that if the nearest sum and difference frequencies lie in the transmission region then bit-rate capability of optical fiber soliton information superhighways can be increased. When soliton pulses propagate in the optical fiber with loss and inserted optical amplifiers, the main difficulty is that after amplification the soliton lose their ideal soliton shape and nonsoliton radiation appears. A topic of particular interest is the development of the methods of the theory of optimal control of distributed media for the nonlinear equations solvable by the IST method. Novel ideas and results obtained in this paper include distributed optimal control formulation of the IST method. Obtained solution to the problem describe the amplification of the solitons by the optimal manner without formation of nonsoliton radiation.

关键词： optical fiber soliton optimal control all-optical communications computing switching routing

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Switch setting algorithms for the optical N-gon prism switch

Switch setting algorithms for the optical N-gon prism switch

引用

conference on all-optical communication systems - architecture, control, and network issues III

作者： Giglmayr, J Heinrich-Hertz-Institut fuer Nachrichtentechnik Berlin GmbH (Germany)

ISBN: (纸本)0819426636

The optical N-gon prism switch is the simplest multi-layer architecture and a starting point for novel all-optical switching architectures. The N-gon prism switch is composed of parallel waveguides at each layer;switching between the waveguides at each layer and switching between the waveguides at adjacent layers is assumed, and the optics comes in by the transmission of light through the waveguides. Throughout the paper, switch setting algorithms for the N-gon prism switch are discussed where (1) an approach to an algebraic and scalable algorithm is presented for its fast implementation and (2) the further development of the multi-layer switching concept is taken into account.

关键词： multi-layer waveguides Silberberg switch cellular array rectangular cellular array pruned switches Spanke-Benes network planarization path-selection switch decomposition of permutations

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Physical layer dimensioning of SuperPON architectures

Physical layer dimensioning of SuperPON architectures

引用

conference on all-optical communication systems - architecture, control, and network issues III

作者： Senior, JM Phillips, AJ vanDeventer, MO Manchester Metropolitan Univ. (United Kingdom) Royal PTT Nederland/KPN Research (Netherlands)

ISBN: (纸本)0819426636

Power budget dimensioning of semiconductor optical amplifier based SuperPON architectures originating from the EC ACTS project PLANET is described. The upstream power budget is critical for SuperPONs. Under worst case conditions it is found that a 5 SOA cascade in the upstream is capable of achieving the full PLANET target system dimensions (2048 way split and 100 km range). Longer feeders are also found to be possible, with the use of further feeder amplification stages, which is useful for the situation when the SuperPON is to be deployed in a ring trenching structure.

关键词： SuperPON access network optical amplifiers power budget system dimensions

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Management in the WDM all-optical network

Management in the WDM all-optical network

引用

conference on all-optical communication systems - architecture, control, and network issues III

作者： Tomic, S Siemens AG (Austria)

ISBN: (纸本)0819426636

The managed all-optical WDM transport network with the all-optical cross-connects is offering not only the high bandwidth, which can be shared between arbitrary clients accessing the network, by static allocation of the trails (also denoted as optical paths) or the virtual sub-networks, but also the service to perform reconfiguration of such virtual sub-networks and to reassign the capacity according to the demands and services required from the client, by the management actions. To fulfill the management task of providing the optical path, which is characterized by a set of optical parameters in the optical domain, the optical network management system must act upon the requirements of the different clients. This imposes that these requirements have their representation in the optical domain and vice versa. In this article we are investigating the possible approaches to WDM network management, first starting from the assumption that the capacity in the network can be arbitrarily shared between different transparent optical paths, and then introducing the analogous transmission parameters related to the transmission equipment and media which restrict this capability and make the management of the optical path dependent on the different types of the clients and different utilization of the capacity in the network. It is shown how those parameters are to be assigned to the different layers in the proposed layered architecture model of the optical network. This model is also discussed from the view point of the management integration and the optical QoS parameters mapping to the client QoS parameters are proposed.

关键词： management WDM interworking QoS

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Practical aspects of optically integrated communication/sensor networking

Practical aspects of optically integrated communication/sens...

引用

conference on all-optical communication systems: architecture, control and network issues

作者： Pervez, A S BANK UNIV SCH ELECT ELECTR & INFORMAT ENGNLONDON SE1 0AAENGLAND

ISBN: (纸本)0819419788

The concept of optically integrated networking is experimentally verified. The operational procedures of the integrated system and methods for signal separation and detection are explained. The degree of degradation of each traffic as a result of the spectral overlapping is analyzed and power penalties evaluated. It is verified that the communication traffic may be recovered with negligible power penalty. The optimum solution in terms of the signal to noise ratio for the sensor traffic is shown to be the whitened matched filter detection. However, this solution results in an unacceptable degree of intersymbol interference (ISI). Thus, a zero forcing ISI solution is also presented and the system performance is re-evaluated taking both the noise and ISI into account.

关键词： optically integrated networking extended LANs digital optical sensor networks

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The deployment of private WDM networks

The deployment of private WDM networks

引用

conference on all-optical communication systems: architecture, control and network issues

作者： Cahn, RS IBM CORP THOMAS J WATSON RES CTRYORKTOWN HTSNY 10598

ISBN: (纸本)0819419788

Technology that debuted in the public switched network has been moving, over recent years, into private networks. While there is no need to justify Wavelength Division Multiplexing (WDM) in the public switched network, which makes good use of higher capacity equipment, the cost effectiveness of private WDM networks is not at all clear. In this paper, we investigate of deploying WDM with Asynchronous Transfer Mode (ATM) networks. The WDM networks provide the physical layer;the ATM networks form a logical layer, using light paths from the WDM network. There are 4 different benefits to be derived from such an arrangement, including the possibility of reduced network cost. An algorithm for the design of logical networks is developed. This algorithm has been incorporated in the Intrepid network design tool. © 1995 SPIE.

关键词： WDM ATM logical network MENTOR

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Converter placement on wavelength-routed network paths

Converter placement on wavelength-routed network paths

引用

conference on all-optical communication systems - architecture, control, and network issues III

作者： Azizoglu, M Subramaniam, S Somani, AK Univ. of Washington (United States)

ISBN: (纸本)0819426636

In this paper, we consider the problem of optimally placing a given number of wavelength converters on a path to minimize the call blocking probability. Using a simple performance model, we first prove that uniform spacing of converters is optimal for the end-to-end performance when link loads are uniform and independent. We then show that significant gains are achievable with optimal placement compared to random placement. For non-uniform link loads, we provide a dynamic programming algorithm for the optimal placement and compare the performance with random and uniform placement.

关键词： wavelength routing wavelength converters circuit switching blocking probability converter placement

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Pulse position modulation for a subcarrier multiplexed optical fibre transmission system

Pulse position modulation for a subcarrier multiplexed optic...

引用

conference on all-optical communication systems - architecture, control, and network issues II

作者： Wickramasinghe, VR Ghassemlooy, Z SHEFFIELD HALLAM UNIV SCH ENGNELECT & COMMUN ENGN RES GRPSHEFFIELD S1 1WBS YORKSHIREENGLAND

ISBN: (纸本)0819423211

Subcarrier multiplexed (SCM) optical networks offer a near to medium term alternative solution over high cost, evolving digital technology to distribute broadband services. Majority of existing systems are based on analogue optical transmission techniques and their principle disadvantage is the sensitivity to noise and system nonlinearities. Therefore, conventional SCM systems impose stringent noise and linearity requirements and as a result their performance is limited. A simple and attractive solution is to introduce an appropriate second stage modulator in order to improve the receiver sensitivity, hence the system performance. In this paper a SCM optical transmission system employing pulse position modulation (PPM) as a second stage modulator, for transmission of video, audio and data channels is reported. Signal to noise ratio measurements obtained shows an improvement in optical receiver sensitivity compared with standard SCM systems.

关键词： subcarrier multiplexed systems pulse position modulation optical communication pulse time modulation

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