Berlin 2018 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 5: Semiconductor Lasers
HL 5.6: Vortrag
Montag, 12. März 2018, 10:45–11:00, EW 202
Repetition rate transitions and timing stability improvement in monolithic multi-section semiconductor lasers — •Martin Birkholz1, Julien Javaloyes2, Oleg Nikiforov1, Christoph Weber1, Luke F. Lester3, and Stefan Breuer1 — 1Institut für Angewandte Physik, Technische Universität Darmstadt, Schloss- gartenstraße 7, 64289 Darmstadt, Germany — 2Departamento de Física, Universitat de les Illes Balears, 07122 Palma de Mallorca, Spain — 3Bradley Department of Electrical and Computer Engineer- ing, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
Passively mode-locked lasers (PMLLs) are compact photonic sources delivering high repetition rate (RR) pulse trains and picosecond short optical pulses. An excellent stability of the generated optical pulse train is crucially important towards their application in optical sampling, in optical time division multiplexing or as photonic clocks. In this contribution, we study numerically the optical pulse train stability improvement and transitions to higher harmonic RRs in a monolithic semiconductor laser with interdigitated absorber placement by the simulation tool FreeTWM (http://onl.uib.eu/softwares). The laser under investigation is 4 mm long, corresponding to a fundamental RR of 10 GHz, and consists of 2 gain and 2 absorber sections. By using numerical continuation transitions from fundamental mode locking to higher harmonic mode locking occur. Associated with these transitions is an improved timing stability. Experimental studies on timing stability and RR transitions confirm the simulated results.