Regensburg 2010 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 31: Poster I: Devices, Quantum Dots and Quantum Wires
HL 31.3: Poster
Dienstag, 23. März 2010, 18:30–20:30, Poster D1
Cavity design and heat management in Vertical-External-Cavity Surface-Emitting Lasers (VECSELs) — •Jens Herrmann1, Alexej Chernikov1, Martin Koch1, Tsuei-Lian Wang2, Yushi Kaneda2, Mike Yarborough2, Jörg Hader2, Jerome V. Moloney2, Bernardette Kunert1, Wolfgang Stolz1, Sangam Chatterjee1, and Stephan W. Koch1 — 1Faculty of Physics and Material Sciences Center, Philipps-Universität Marburg — 2College of Optical Sciences, University of Arizona, Tucson, USA
Vertical-External-Cavity Surface-Emitting Lasers (VECSELs) represent a combination of high output power, high efficiency and good beam quality with compact design in the infrared spectral range. Furthermore large areas of the visible spectrum are accessible due to high-speed frequency-doubled SDLs. In high-power applications cavity design combined with heat management is very important.
We experimentally investigate a model high-power device at 1040nm. The linear cavity consists of the semiconductor chip and a spherical external output coupler. The performance dependence on the reflectance of the output coupler is discussed before we vary the pump spot with the help of the pump optics.
Following we compared the impact of different materials (copper and diamond) for the heat spreader and different heat management concepts. The performance of the device, spectrally resolved emission and the characteristic, curve is investigated under comparable high-power pump conditions and cavity design. In the end the impact of different cavity designs on the performance of the device is compared.