Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

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

HL 36.8: Talk

Thursday, March 15, 2018, 12:15–12:30, EW 202

Optimization upon AlGaInP-based membrane lasers — •Thomas Klumpp, Roman Bek, Hermann Kahle, 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

Vertical external-cavity surface-emitting lasers (VECSELs), also known as optically pumped semiconductor disc lasers (OPSDLs), are becoming more and more popular due to their simplicity and excellent emission properties. Improvements regarding the output power can be obtained by optimized semiconductor gain structures, but also by advanced methods for heat extraction from the active region. Especially for AlGaInP-based VECSELs emitting in the red spectral range, one of the main limitations is the low charge carrier confinement in combination with heat incorporated into the active region by optical pumping. The thermal management can be particularly improved by a membrane laser concept, the membrane external-cavity surface-emitting laser (MECSEL). Furthermore, with the active region sandwiched between two transparent intracavity heat spreaders, growth of a distributed Bragg reflector is avoided. We present our current work on the progress of AlGaInP-based MECSELs aiming on high output power and wavelength versatility.