Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 36: Focussed Session: Frontiers in Laser Diode Physics I

HL 36.10: Talk

Thursday, March 15, 2018, 12:45–13:00, EW 202

Towards mode locking of a semiconductor membrane laser — •Ana Ćutuk, Roman Bek, Michael Jetter, and Peter Michler — Institut für Halbleiteroptik und Funktionelle Grenzflächen, Center for Integrated Quantum Science and Technology (IQST) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart

Optically pumped semiconductor disk lasers (SDLs) provide several advantageous properties like near-diffraction-limited beam profile and the flexibility to add optical components inside the cavity. However, due to the incorporated heat in the active region by the pump laser, the output power of SDLs is limited by the thermal management. A new concept, the membrane external-cavity surface-emitting laser (MECSEL), first presented in 2016, uses an active region sandwiched between heat spreaders for optimized heat dissipation. Furthermore, it enables new material combinations for new laser wavelengths, which are not possible with the Bragg reflector in the conventional disk laser. Especially attractive is the combination of this new laser device with semiconductor saturable absorbers for ultrafast pulse generation.

In this contribution, we investigate the characteristics of an AlGaInP-based MECSEL emitting in the red spectral range. Current research focuses on time and frequency domain measurements with and without an absorbing semiconductor intracavity component and evaluates the possibility of mode-locked operation.