Detailed dynamic performance analysis and feasibility assessment of emerging optical switching and its impact on the performance of a fully reconfigurable WDM transport network.
Item
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Title
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Detailed dynamic performance analysis and feasibility assessment of emerging optical switching and its impact on the performance of a fully reconfigurable WDM transport network.
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Identifier
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AAI9917692
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identifier
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9917692
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Creator
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Richards, Dwight Hugh.
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Contributor
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Adviser: Mohamed Ali
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Date
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1999
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Language
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English
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Publisher
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City University of New York.
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Subject
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Engineering, Electronics and Electrical | Physics, Optics
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Abstract
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This thesis presents a detailed dynamic performance analysis and feasibility assessment of emerging optical switching and its impact on the performance of reconfigurable WDM transport networks. Specifically, this thesis compares and examines the potential of both existing and emerging WDM switching technologies and characterizes a novel prototype liquid crystal crossconnect.;This work examines and identifies EDFA dynamic response to different reconfiguration scenarios (switching) and how this might impact the overall network performance. Each network reconfiguration scenario is shown to cause its own network performance degradation, and requires a different set of EDFA engineering design rules to mitigate this effect. The main objective is to maintain a constant per channel output power in case of a network reconfiguration (adding/dropping of channels) as well as how to identify and recover from failures in the network.;This thesis will present the first experimental study of an all-optical feedback technique for stabilizing the per-channel output both for single amplifier and cascade of amplifiers. This technique is simple, inexpensive, and robust, requiring neither monitoring of the amplifier output nor any active feedback. One of the great virtues of this technique is that only the first in a chain of amplifiers needs to be modified. Two different all-optical methods of controlling transient power excursions of surviving channels in a chain of EDFAs when switching occurs as a result of the adding or dropping of channels is presented and compared. The focus is on the dynamic effects due to the switching of channels. This study is then extended to look at dynamic effects in self-healing WDM ring networks where fault recovery is achieved through a protection switching mechanism, and how the interaction between the switching dynamics and the dynamics of the EDFAs affects our ability to detect and recover from failures. The ability to detect failures such as fiber cuts is complicated by the amplified spontaneous emission (ASE) noise from the same EDFAs that make WDM possible. We will examine the fundamental difficulties that this ASE imposes on some schemes for detecting failures and propose our novel method that overcomes these difficulties.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
