Regensburg 2019 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 35: HL Poster II
HL 35.61: Poster
Wednesday, April 3, 2019, 17:30–20:00, Poster E
Monolithic quantum well mode-locked laser subject to short optical feedback with nanometric resolution — •Pascal Sauer1, Dominik Auth1, Christoph Weber1, Andreas Klehr2, Andrea Knigge2, and Stefan Breuer1 — 1Institute of Applied Physics, Technische Universität Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt, Germany — 2Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany
Self feedback by long external optical cavities significantly enhances the timing stability and repetition rate agility of optical pulse trains generated by monolithic passively mode-locked semiconductor lasers. The impact of very short feedback cavities with nanometric feedback delay control has recently been suggested and studied by simulations [Simos et al., Appl. Phys. B 123 (2017), 222]. In this contribution, the impact of a free-space external cavity configuration with macroscopic delay lengths ranging from 10 mm to 40 mm and nanometric resolution fine-delay control on the emission properties of a quantum-well passively mode-locked semiconductor laser emitting at 1070 nm at a free-running repetition rate of 13.6 GHz is studied experimentally. Wavelength scale dynamics of the center wavelength, the repetition rate and the optical output power are identified experimentally and discussed in the framework of recent long-cavity optical self feedback results [Auth et al., Electron. Lett. 54 (2018), 374].