Dresden 2017 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 18: Semiconductor Lasers II
HL 18.7: Vortrag
Montag, 20. März 2017, 16:45–17:00, POT 06
Towards self-mode locking of VECSELs in the red spectral range — •Marius Großmann1, Roman Bek1, Max Vaupel2, Hermann Kahle1, Thomas Schwarzbäck1, Arash Rahimi-Iman2, Michael Jetter1, Martin Koch2, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen and Research Centers SCoPE and IQST, Universität Stuttgart, Allmandring 3, 70569 Stuttgart, Germany — 2Department of Physics and Materials Sciences Center, Philipps-Universität Marburg, Renthof 5, 35032 Marburg, Germany
The introduction of mode-locked vertical external-cavity surface-emitting lasers (VECSELs) in 2000 was followed by tremendous progress in laser performance, especially for mode locking within the IR spectral range. Such devices facilitate a compact realization of ultrafast and -short pulse generation and are certainly desirable over a wide wavelength range. The recently demonstrated self-mode locking technique simplifies these devices even more, bypassing the intrinsic non-saturable losses of semiconductor saturable absorber mirrors.
We present the characterization of pulsed VECSELs with repetition rates in the GHz regime with focus on self-mode locking in the red spectral range. Our semiconductor structures are fabricated by metal-organic vapor-phase epitaxy. The active regions consist of quantum wells or dots based on the AlGaInP material system. Current research includes the investigation of hard and soft aperture modulation initiating the pulsed operation as well as the effect of the gain chip characteristics on the mode locking behavior.