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NONLINEAR OPTICAL SIGNAL PROCESSING FOR HIGH-SPEED,
SPECTRALLY EFFICIENT FIBER OPTIC SYSTEMS AND NETWORKS
by
Bo Zhang
A Dissertation Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(ELECTRICAL ENGINEERING)
May 2009
Copyright 2009 Bo Zhang
Object Description
| Title | Nonlinear optical signal processing for high-speed, spectrally efficient fiber optic systems and networks |
| Author | Zhang, Bo |
| Author email | boz@usc.edu; bozbozboz@gmail.com |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Electrical Engineering |
| School | Viterbi School of Engineering |
| Date defended/completed | 2008-12-01 |
| Date submitted | 2009 |
| Restricted until | Unrestricted |
| Date published | 2009-02-26 |
| Advisor (committee chair) | Willner, Alan E. |
| Advisor (committee member) |
Steier, William H. Bickers, Nilsen Eugene |
| Abstract | The past decade has witnessed astounding boom in telecommunication network traffic. With the emergence of multimedia over Internet, the high-capacity optical transport systems have started to shift focus from the core network towards the end users. This trend leads to diverse optical networks with transparency and reconfigurability requirement. As single channel data rate continues to increase and channel spacing continues to shrink for high capacity, high spectral efficiency, the workload on conventional electronic signal processing elements in the router nodes continues to build up. Performing signal processing functions in the optical domain can potentially alleviate the speed bottleneck if the unique optical properties are efficiently leveraged to assist electronic processing methodologies. Ultra-high bandwidth capability along with the promise for multi-channel and format-transparent operation make optical signal processing an attractive technology which is expected to have great impact on future optical networks.; For optical signal processing applications in fiber-optic network and systems, a laudable goal would be to explore the unique nonlinear optical processes in novel photonic devices. This dissertation investigates novel optical signal processing techniques through simulations and experimental demonstrations, analyzes limitations of these nonlinear processing elements and proposes techniques to enhance the system performance or designs for functional photonic modules.; Two key signal-processing building blocks for future optical networks, namely slow-light-based tunable optical delay lines and SOA-based high-speed wavelength converters, are presented in the first part of the dissertation. Phase preserving and spectrally efficient slow light are experimentally demonstrated using advanced modulation formats. Functional and novel photonic modules, such as multi-channel synchronizer and variable-bit-rate optical time division multiplexer are designed and demonstrated using slow-light tunable delay lines. Deleterious signal degrading effects on SOA-based differential mode wavelength converters are experimentally identified and techniques to alleviate or eliminate them are proposed.; The second part of the dissertation discusses enabling technologies for enhancing the system performance or enriching the system functionalities. Two novel optoelectronic devices, namely the optical injection-locked VCSEL and MEMS actuated micro-disk resonator, are utilized for the demonstration of transmission reach extension and dynamic bandwidth allocation, respectively. Additionally, polarization-based novel optical instruments, such as a polarimeter-enabled optical spectrum analyzer and an all-optical automatic polarization de-multiplexer, are designed and demonstrated. Finally, a 40-Gb/s capable re-circulating fiber loop test-bed is constructed and design guidelines as well as experimental results are discussed in detail. |
| Keyword | optical fiber communication; optical signal processing; nonlinear optics; slow light; advanced modulation format; differential phase shift keying; differential quadrature phase shift keying |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m1988 |
| Rights | Zhang, Bo |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | http://www.usc.edu/isd/libraries/services/ask_a_librarian/email/ |
| Filename | etd-Zhang-2575 |
| Archival file | uscthesesreloadpub_Volume40/etd-Zhang-2575.pdf |
Description
| Title | Page 1 |
| Full text | NONLINEAR OPTICAL SIGNAL PROCESSING FOR HIGH-SPEED, SPECTRALLY EFFICIENT FIBER OPTIC SYSTEMS AND NETWORKS by Bo Zhang A Dissertation Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (ELECTRICAL ENGINEERING) May 2009 Copyright 2009 Bo Zhang |
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