No description available.

No description available.

Optical multiaccess networks, and more specifically passive optical networks (PONS) are considered to be one of the most promising technologies for deploying fiber-to-the-building/home/curb (FTTx). PONs are expected to solve the problem of limited bandwidth, the so called "first and last mile problem", that remains the bottleneck between the backbone network and high-speed local area networks (LANs). PONs provide a low-cost solution and a guaranteed quality of service (QoS) to enable new multimedia services. In a PON, multiple users share the fiber infrastructure in a point-to-multipoint (P2MP) network topology. This is in contrast to current access technologies, including DSL, VDSL, and cable, which use a point-to-point (P2P) network topology. The P2MP nature of networks introduces optical path delays which inherently cause the data packets to undergo amplitude, phase, and frequency variations - burst, mode trafic. This consequently creates new challenges for the design of optical receivers. / Optical receivers, and in particular, burst-mode receiver front-ends (BM-RXs) and burst-mode clock and data recovery circuits (BM-CDRs), must adapt to burst-mode traffic, where data bursts originate from various sources and travel different distances. The amplitude and phase of successive packets may therefore vary anywhere between 0--20 dB and --pi to +pi rads. The research objective of this thesis is to design, test, and enhance performance requirements of BM-CDRs for PONs. / We design and experimentally demonstrate a 622/1244 Mb/s BM-CDR with forward error correction (FEC) using Reed-Solomon (R-S(255, 239)) codes for Gigabit PONs (GPONs). We measure a coding gain of approximately 5 dB at bit error ratio (BER) of 10-10. The coding gain obtained verifies the claim of the increased link budget specified by ITU-T G.984.3 standard. / We also develop a novel technique for fast burst-error correction for bursty channels. This is achieved by employing FEC on BM-CDRs with fast phase acquisition time. We demonstrate this with our custom built bit error rate tester/analyzer (BBERT/A). / Finally, we develop a small-signal modeling technique for characterizing photodiodes. This technique is based on the measurement of S 11 parameters. We demonstrate our idea with a 10 GHz 1310/1550 nm InGaAs/InP PIN photodiode.

No description available.

The tremendous growth in broadband communication services, brought about by the phenomenal expansion of the Internet, has triggered an unprecedented demand for bandwidth in telecommunication networks. Optical fibre communication technology has kept up with the growing bandwidth demand by exploiting wavelength division multiplexing (WDM) technology. WDM is now beginning to expand from a network core technology towards the metropolitan and access networks with the goal of bringing the benefit of cost and network efficiencies of the optical networking revolution to the end users. The advent of metropolitan WDM networks has motivated the work in this thesis to develop new devices and design methods in order to reduce cost and improve network performance. (For complete abstract open document)

Thesis (Ph. D.)--University of New South Wales, 2004. / Also available online.

Thesis (M. Phil.)--University of Hong Kong, 2009. / Includes bibliographical references (p. 69-72) Also available in print.

Project report (M.S.)--Virginia Polytechnic Institute and State University, 1990. / Abstract. Includes bibliographical references (leaves 53-54). Also available via the Internet.

Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2004. / Includes bibliographical references (leaves 123-127). Also available in electronic version. Access restricted to campus users.

Thesis (Ph. D.)--University of Texas at Austin, 2004. / Supervisor: Joe C. Campbell. Vita. Includes bibliographical references.