Buch, Englisch, 224 Seiten, Hardcover kaschiert, Format (B × H): 148 mm x 210 mm, Gewicht: 425 g
Reihe: Physik
Buch, Englisch, 224 Seiten, Hardcover kaschiert, Format (B × H): 148 mm x 210 mm, Gewicht: 425 g
Reihe: Physik
ISBN: 978-3-8439-2934-9
Verlag: Dr. Hut
In the present scientifc study, performed at the "Institut für Halbleiteroptik und Funktionelle Grenzflächen" (IHFG), University of Stuttgart, we examined optically pumped AlGaInP-based semiconductor disk lasers emitting in the red wavelength range (650 - 670 nm). The goals of this study were to improve the overall performance of these lasers and to increase the power of the extracted intra-cavity created second harmonic laser (325 - 335 nm) as far as possible pursueing three strategies:
Applying a strain compensation technique to create, according to the strain situation around the quantum well (QW)-packages, a more homogenous environment for each QW-package. Adapting the distribution of the QWs inside the active region of the laser to the amount of absorbed pump light. Thereby, a more homogeneous charge carrier distribution is created in the single QW-packages leading to better spectral overlap of the gain provided by each QW-package. And finally, wet-chemically isolating the laser-active region and embedding it between two intra-cavity heat spreaders. This heat spreader sandwiched membrane external-cavity surface-emitting laser (MECSEL) design optimizes the heat dissipation out of the active region by makinge Bragg reflectors obsolete which generally provide low heat conductivity. The MECSEL enables a variety of new material combinations for new laser wavelengths and provides further potential for power scaling.
