β Scribed by Holger Schmeckebier (auth.)
No coin nor oath required. For personal study only.
This thesis examines the unique properties of gallium arsenide (GaAs)-based quantum-dot semiconductor optical amplifiers for optical communication networks, introducing readers to their fundamentals, basic parameters and manifold applications. The static and dynamic properties of these amplifiers are discussed extensively in comparison to conventional, non quantum-dot based amplifiers, and their unique advantages are elaborated on, such as the fast carrier dynamics and the decoupling of gain and phase dynamics. In addition to diverse amplification scenarios involving single and multiple high symbol rate amplitude and phase-coded data signals, wide-range wavelength conversion as a key functionality for optical signal processing is investigated and discussed in detail. Furthermore, two novel device concepts are developed and demonstrated that have the potential to significantly simplify network architectures, reducing the investment and maintenance costs as well as the energy consumption of future networks.
Front Matter....Pages i-xxiii
Preamble....Pages 1-11
Introduction to Semiconductor Optical Amplifiers (SOAs)....Pages 13-34
Samples and Characterization....Pages 35-73
Introduction to System Experiments....Pages 75-91
Concept of Direct Phase Modulation....Pages 93-100
Signal Amplification....Pages 101-123
Concept of Dual-Band Amplifiers....Pages 125-144
Signal ProcessingβWavelength Conversion....Pages 145-173
Summary and Outlook....Pages 175-180
Back Matter....Pages 181-190
Semiconductors;Optics, Lasers, Photonics, Optical Devices;Signal, Image and Speech Processing
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Excellent source of introductory issues to the hot subject of quantum dots. It is now a bit old, not accounting for the new advances in the last 5 years, but still the necessary material to start.
<p>Communications can be broadly defined as the transfer of information from one point to another. In optical fibre communications, this transfer is achieved by using light as the information carrier. There has been an exponential growth in the deployment and capacity of optical fibre communication