Quantum-Dot-Based Semiconductor Optical Amplifiers for O-Band Optical Communication
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.
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2 Introduction to Semiconductor Optical Amplifiers SOAs
3 Samples and Characterization
4 Introduction to System Experiments
5 Concept of Direct Phase Modulation
6 Signal Amplification
7 Concept of DualBand Amplifiers
8 Signal ProcessingWavelength Conversion
9 Summary and Outlook
Appendix A Gain Calculation of Broadband Signals
Appendix B Device Setups
Appendix C Measured BitError Ratio BER Curves
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Quantum-Dot-Based Semiconductor Optical Amplifiers for O-Band Optical ...
No preview available - 2016
3-dB saturation input 40 GBd OOK all-optical amplitude modulation ASE emission ASE peak band BER curves BER measurements carrier density carrier reservoir coherent detection receiver constellation diagrams coupling losses D(Q)PSK data signals dependence detuning device device under test differential detection receiver DPSK DQPSK DQPSK signal error-free eye diagram fiber-to-fiber gain four-wave mixing gain dynamics gain media gain recovery Gb/s GS signal idler IEEE Photonics Technol increasing input power levels input signal IPDR laser Lett modulated signals modulation formats multi-channel networks noise figure nonlinear O-band OOK signals Optical Communication OSNR output power PDFA phase-coded signals Photonics polarization Prec penalty pulse Q-factor QD gain QD GS QD SOA input quantum dot quantum-dot semiconductor optical receiver input power refractive index saturation input power Schmeckebier semiconductor optical amplifier setup signal quality SOA input power spectral symbol rate Technische Universitšt Berlin thesis waveguide wavelength conversion