Regensburg 2019 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 35: HL Poster II
HL 35.72: Poster
Mittwoch, 3. April 2019, 17:30–20:00, Poster E
Optical frequency comb splitting of nanostructured semiconductor lasers — •Christoph Weber1, Lorenzo L. Columbo2, Paolo Bardella2, Luke F. Lester3, Stefan Breuer1, and Mariangela Gioannini2 — 1Institute of Applied Physics, Technische Universität Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt, Germany — 2Department of Electronics and Telecommunications, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy — 3Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, Virginia 24061, USA
Self mode-locked semiconductor lasers with nanostructured active regions based on quantum wells, quantum dashes, quantum dots or quantum cascade lasers are promising optical frequency comb sources in crucial wavelength ranges for e.g. optical communication or spectroscopy applications. We experimentally investigate and study by simulations the spectral emission of a single-section InAs/InGaAs quantum dot laser emitting at near infrared wavelengths. We recently identified a temperature dependent mode-locking threshold [Bardella et al., Proc. SPIE 10682 (2018), 1068223], where unlocked multimodal emission switches to mode-locked emission. At this threshold, a splitting in the optical comb is detected and further analyzed in dependence of applied gain current and device temperature. We discuss the obtained results in the framework of published results on nanostructured semiconductor lasers within a broad emission wavelengths range.