Berlin 2018 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 13: Poster Session I
HL 13.83: Poster
Monday, March 12, 2018, 17:30–19:30, Poster B
Timing stability and repetition rate tuning analysis of a passively mode-locked quantum-well semiconductor laser subject to dual-cavity optical self-feedback — •Dominik Auth1, Christoph Weber1, Andreas Klehr2, Andrea Knigge2, and Stefan Breuer1 — 1Institut für Angewandte Physik, Technische Universität Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt, Germany — 2Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany
Monolithic passively mode-locked (PML) semiconductor lasers (SCLs) offer pulse repetition rates (RR) in the Multi-GHz range and picosecond-short optical pulses. Their pulse train timing stability, however, is considerable lower as compared to fiber-based pulsed lasers. All-optical self-feedback (OFB) configurations are elegant concepts without using any additional sources for external time reference and they allow to improve the timing stability and control the RR frequency, both of which are important in photonic communication applications. In this work, we study the influence of OFB by fine-delay controlled dual optical cavities on the pulse RR and the timing jitter (TJ) of a multi quantum-well (QW) SCL emitting at 1070 nm. A 3 mm long PML QW SCL with a saturable absorber length of 10% of the total cavity length is studied. We quantify the timing stability improvement by radio-frequency, temporal and optical domain analysis and in dependence on the OFB strengths as well as the feedback delays. We report on single digit Gigahertz RR control while simultaneously ensuring a substantial TJ reduction.