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Title: Design and implementation of optical buffer architectures for optical packet-switched networks
Author: Salas, Emilio Hugues
ISNI:       0000 0004 2669 8048
Current Institution: University of Essex
Date of Award: 2008
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This thesis focuses on the design, modelling and demonstration of a synchronous optical buffer for an optical packet switch, placed in the core of an optical transport network. The features of the optical buffer are the ability to store and route fixed and variable length packets at fast bit rates. First, an overview of the future optical networks is addressed, presenting the incentives to achieve the next generation optical packet-switched networks. Emerging technologies for signal processing in optical switches are introduced as an alternative to provide better features to the packet switch architecture. Next, the main subsystems of an optical packet switch are provided. Optical packet switching issues are discussed addressing the main needs. The key subsystem considered is the contention resolution technique. Subsequently, the description of the network traffic is provided. From this overview, the requirements of a synchronous optical packet buffer will be described, addressing design rules for an optical buffer in a packet switch node. A novel and simple technique for optical buffering is chosen as part of the contention resolution method within the packet switch. This scheme is examined through modelling and experimentally, and is compared to other contention resolution techniques. The Mach-Zehnder Interferometer is chosen as the main component of the packet buffer method. Through this device, wavelength conversion and regeneration can be achieved, supporting fast transmission speeds. The characteristics ofthenon-linear Mach-Zehnder Interferometer are examined as well. Subsequently, the technique is proved experimentally in order to confirm its feasibility as an optical buffer. Architectural issues concerning the structure of the optical buffer are discussed and the various subsystems of the final model are presented. The buffer limitations are examined and design rules are discussed. Finally, the simulation of a packet switch using this type of optical buffer is presented, proving its feasibility and functionality.
Supervisor: Not available Sponsor: Not available
Qualification Name: Not available Qualification Level: Doctoral
EThOS ID:  DOI: Not available