Self-organization in semiconductor lasers with ultra-short optical feedback [Elektronische Ressource] / von Oleg Ushakov

Self-organization in semiconductor lasers withultra-short optical feedbackDISSERTATIONzur Erlangung des akademischen Gradesdoctor rerum naturalium(Dr. rer. nat.)im Fach Physikeingereicht an derMathematisch-Naturwissenschaftlichen Fakultät IHumboldt-Universität zu BerlinvonHerr Dipl.-Phys. Oleg Ushakovgeboren am 01.03.1978 in Kislowodsk, RusslandPräsident der Humboldt-Universität zu Berlin:Prof. Dr. Christoph MarkschiesDekan der Mathematisch-Naturwissenschaftlichen Fakultät I:Prof. Dr. Cristian LimbergGutachter:1. Prof. Dr.- Fritz Henneberger2. Prof. Dr.- Lutz Schimansky-Geier3. Prof. Dr.-Wolfgang Elsäßereingereicht am: 8. Januar 2007Tag der mündlichen Prüfung: 23. April 2007AbstractInthiswork,self-organizationinsemiconductorlaserswithultra-shortopticalfeedback is investigated. Exploiting dc currents to tune the relevant feedbackparameters, we have experimentally prepared and studied a number of novelnonlinear dynamical scenarios.Two different types of self-sustaining intensity-pulsations are detected de-pending on strength and phase of the feedback. One type of pulsations isemerging in a Hopf-bifurcation from relaxation oscillations. These oscilla-tions become undamped due to dispersive self-Q switching. The second typeof pulsations is a beating of distinct compound-cavity modes. It is also bornin a Hopf bifurcation. These findings represent experimental evidence fortheoretical predictions.