Berlin 2015 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 94: Poster IV A (Laser; Devices; Heterostructures; Surfaces, interfaces and defects)

HL 94.1: Poster

Donnerstag, 19. März 2015, 14:00–20:00, Poster B

Towards AlGaInP-based electrically-pumped VECSELs emitting in the red spectral range — •Mona Stadler, Hermann Kahle, Roman Bek, Michael Jetter, and Peter Michler — Institut für Halbleiteroptik und Funktionelle Grenzflächen and Research Center SCoPE, Allmandring 3, 70569 Stuttgart, Germany

Electrically-pumped vertical external-cavity surface-emitting lasers (EP-VECSELs) combine the advantages of optically-pumped semiconductor disk lasers with an external cavity and vertical cavity surface emitting lasers (VCSELs). Comparable to optically-pumped VECSELs, they exhibit for example scalable output powers and good beam qualities. The external cavity offers the use of elements within the cavity, which is helpful for further applications. In electrically-pumped devices there is no need of special and often expensive laser pump sources. Electrical pumping facilitates higher integration and further miniaturization and is an important step towards compact laser devices. The development of EP-VECSEL is challenging because of several reasons. The design should be as easy as possible, optical losses and Joule heating in doped layers is unavoidable but should be reduced. Therefore, a good thermal management, a suitable carrier distribution and a balance between the optical and electrical requirements is necessary. We present the first steps towards an electrically-pumped AlGaInP-based VECSEL emitting in the red spectral range.