1,721,071 research outputs found
Capacities of WDM transmission systems and networks limited by stimulated Raman scattering
No full textWe derive analytic expressions of the ultimate capacity-length-product (CLP) of the wavelength-division-multiplexing (WDM) transmission systems and the ultimate node throughput-length-product (NTLP) of the WDM networks limited by the stimulated Raman scattering (SRS), The CLP and the NTLP are proportional to the square root of the system capacity and the node throughput, respectively. However, they are independent of the system capacity and the node throughput when we compensate for the SRS induced power depletion. The CLP increases as we decrease the amplifier spacing. However there exists an optimum amplifier spacing that maximizes the NTLP, The analytic results agree well with the numerical simulation ones.This work
was partially supported by KOSEF (Project 97-0100-03-01-3) and ITA (Project
C11 999 003 800)
CONSTRAINT-BASED METAVIEW APPROACH FOR MODELING ENVIRONMENT GENERATION
No full textModeling environments for decision support systems (DSS's) play an important role in improving the efficiency and effectiveness of model-related work. The task of developing such an environment, however, is complicated and time-consuming. To improve the productivity and quality involved in the development of modeling environments, a metaview approach for generating these environments is proposed in this paper. Specifically, a constraint-based modeling framework is designed to specify modeling environments and associated modeling activities. The framework is based on a metaview that any modeling environment is a constraint enforcement system. A prototype environment generator called MetaDSS has been implemented. The practical generation of a modeling environment, a structured modeling environment specifically, is demonstrated using the MetaDSS
Analysis of ultimate capacity and transparency cost of all-optical transport networks based on node throughput
No full text
Bi-directional add/drop amplifier module for high-capacity WDM networks
No full textA bi-directional add/drop amplifier (BADA) module with a superior relative intensity noise (RIN) suppression capability has been realised based on a cost-effective dispersion compensation technique. A 14 x 10 Gbit/s bi-directional transmission over 200 km-long conventional SMF and channel-by-channel add/drop has been successfully demonstrated. The scalability of the BADA module is analysed
A low-cost WDM source with an ASE injected Fabry-Perot semiconductor laser
No full textWe propose and demonstrate a novel wavelength-division-multiplexing (WDM) source employing an uncooled and unisolated Fabry-Perot semiconductor laser diode (F-P SLD), The output wavelength of F-P SLD is locked to the externally injected narrow-band amplified spontaneous emission (ASE), The measured side-mode suppression ratio of the wavelength-locked F-P SLD is larger than 29 dB, when the extinction ratio of the directly modulated light output is above 13 dB, We achieved error-free transmission of 155-Mb/s data over 120 km of nondispersion-shifted fiber. We also propose a cost-effective WDM passive optical network architecture based on the proposed light sources.This work was
supported in part by the Institute of Information Technology Assessment under
Project C11999003800
Geometric Properties of 3D Data Represented by DoSurface
Full text linkIn the DoSurface(Depth on Surface), the depth information of 3D world is represented by a set of segments based on a particular surface. Each segment belongs to a location on the surface. The DoSurface is quite similar to the well-known run-length representation of binary images. As the geometric features of 2D object can be computed very easily by using the run-length representation, those of 3D object can be computed in a very similar way. This paper presents an efficient method for calculating the geometric properties of 3D objects represented by DoSurface
Automatic gain-controlled bidirectional add-drop amplifier for dynamically reconfigurable bidirectional WDM networks
No full textAn automatic gain-controlled bidirectional add-drop amplifier (BADA) has been realized based on a pump control technique for use in bidirectional wavelength division multiplexed (WDM) networks. By using the BADAs, we demonstrate a dynamically reconfigurable bidirectional WDM ring network. The BADA enables dynamic add-drops of wavelength-interleaved bidirectional signals and protects surviving signals against the impairments induced by dynamic network reconfigurations
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