cam a22 4500 528781685 20201202094712.0 cr unu---uuuuu 180924e201807 xx sm 000 0 eng 978-3-906916-27-9 10.3929/ethz-b-000272998 doi (ETHRESEARCH)oai:www.research-collection.ethz.ch:20.500.11850/272998 Marculescu Andrej Semiconductor Optical Amplifiers: Modeling, Signal Regeneration and Conversion [Elektronische Daten] [Andrej Marculescu, Juerg; id_orcid 0000-0003-0111-8169 Leuthold (Supervisor), Wolfgang Freude (Supervisor), Andreas Schenk (Supervisor)] Zurich ETH Zurich 2018 201 p. Doctoral Thesis Open access ethresearch Semiconductor optical amplifiers (SOAs) have found widespread use in optical communications covering the important telecommunications window with optical carrier wavelengths from 1.1 μm up to 1.6 μm. While amplifiers are usually operated in their linear region, the inherent nonlinearities of SOAs can be exploited for all-optical signal processing like signal regeneration, wavelength conversion, and modulation format conversion. For both, linear and nonlinear applications, the onset and the amount of the nonlinear response is important for choosing the proper operating point. In this book a nonlinear SOA model is developed. Measuring the spectra resulting from a pump-probe experiment, the strength of the various nonlinear contributions can be assigned to inter- and intraband carrier dynamics in the semiconductor. The experiments reveal for the first time the importance and the role of two-photon induced free carrier absorption FCATPA - an effect that so far was not properly taken care of. The resulting blue-shifted sideband makes it possible to design a patterning-free all-optical wavelength converter. More generally, this model helps in finding optimal optical filter schemes for wavelength converters, resulting in patterning-free output signals at high bit rates. In Copyright - Non-Commercial Use Permitted http://rightsstatements.org/page/InC-NC/1.0 ethresearch semiconductor optical amplifier (SOA) ethresearch Electric engineering ethresearch Engineering & allied operations ethresearch Physics ethresearch Leuthold Juerg; id_orcid 0000-0003-0111-8169 Supervisor dgs Freude Wolfgang Supervisor dgs Schenk Andreas Supervisor dgs http://hdl.handle.net/20.500.11850/272998 text/html WWW-Backlink auf das Repository (Open access) BK020353 XK020053 XK020000 1 Doctoral Thesis ethresearch ETHRESEARCH ETHRESEARCH ETHRESEARCH Doctoral Thesis Open access ETHRESEARCH 856 40 http://hdl.handle.net/20.500.11850/272998 text/html WWW-Backlink auf das Repository (Open access) ETHRESEARCH 100 1- Marculescu Andrej ETHRESEARCH 700 1- Leuthold Juerg; id_orcid 0000-0003-0111-8169 Supervisor dgs ETHRESEARCH 700 1- Freude Wolfgang Supervisor dgs ETHRESEARCH 700 1- Schenk Andreas Supervisor dgs SWISSBIB 528781685