Berlin 2018 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 13: Poster Session I
HL 13.85: Poster
Montag, 12. März 2018, 17:30–19:30, Poster B
Performance and Dynamics of Three-Section Tapered Mode-Locked Lasers — •Stefan Meinecke1, Lukas Drzewietzki2, Christoph Weber2, Benjamin Lingnau1, Stefan Breuer2, and Kathy Lüdge1 — 1Institut für Theoretische Physik, Technische Universtität Berlin, Berlin, Germany — 2Institut für Angewandte Physik, Technische Universtität Darmstadt, Darmstadt, Germany
Passively mode-locked semiconductor lasers are inexpensive sources of short optical pulses with high repetition rates. They find applications in high-capacity optical interconnects and high-precision metrology, where stable pulse trains with small amplitude and timing jitter are required. Optimizing the design of monolithic mode-locked semiconductor lasers for such demands has therefore become of major interest.
Combining a traveling-wave model for the electric field propagation with microscopically based quantum-dot (QD) charge-carrier rate equations, we investigate the performance and dynamics of monolithically integrated multi-section QD mode-locked lasers. In this work, we focus on a three section device with two short straight sections at one end, which can be individually biased, and a long tapered gain section at the pulse emission facet.
Our simulations nicely reproduce experimental results and furthermore enable us to predict device geometry for stable operating regimes that exhibit short and high power pulses with low timing jitter. We especially study the influence of the position and length of saturable absorber and the taper angle of the long gain section.