Dresden 2011 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 88: Lasers
HL 88.4: Vortrag
Freitag, 18. März 2011, 11:00–11:15, POT 151
Thermal properties of high power vertical-external-cavity surface-emitting lasers — •Alexej Chernikov1, Jens Herrmann1, Maik Scheller1, Martin Koch1, Bernadette Kunert1, Wolfgang Stolz1, Sangam Chatterjee1, Stephan W. Koch1, Tsuei-Lian Wang2, Yushi Kaneda2, Joe M. Yarborough2, Jörg Hader2, and Jerome V. Moloney2 — 1Faculty of Physics and Material Sciences Center, Philipps-Universität Marburg, Renthof 5, D-35032 Marburg, Germany — 2College of Optical Sciences, The University of Arizona, 1630East University Boulevard, Tucson, AZ 85721, USA
Vertical-external-cavity surface-emitting lasers (VECSELs), developed in the late 90s, have received much attention in the scientific community due to the unique combination of high output power and excellent beam quality. VECSELs provide light across a broad spectral range, efficient intra-cavity frequency mixing as well as the possibility for pulsed operation. The majority of the applications rely on the high output power of the device. Since overheating generally limits the laser performance, efficient cooling concepts as well as careful choice of the pump profile are crucial. Here, we focus on the thermal properties of a high-power VECSEL. Spatially resolved temperature measurements are performed under simultaneous monitoring of the output characteristics of the device. Our results illustrate the substantial importance of three-dimensional heat transfer in the structure, limiting the VECSEL performance for large spot sizes. Finally, the heat-removal concept is optimized for a maximum output power above 70 W.