Hermann A. Kahle

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The phase diagram of (Tb,, Dyl-,) V04 was studied by crystal optical methods. The low-temperature properties of the mixed crystals are found to depend on the different distorted structures of the pure substances. In (Tb0.4, Dyo.6) VOr, two phase transitions are observed, resulting in a superposition of the two distortion types. DyV04 and TbV04 are(More)
An output power of 2.5 W at a wavelength of 665 nm was obtained from a quantum-well (QW) and multipass-pumped AlGaInP-based vertical-external-cavity surface-emitting laser operated at a heat sink temperature of 10°C. Intracavity frequency doubling resulted in an output power of 820 mW at a wavelength of 333 nm. To the best of our knowledge, these are the(More)
We present a passively mode-locked semiconductor disk laser (SDL) emitting at 650nm with intra-cavity second harmonic generation to the ultraviolet (UV) spectral range. Both the gain and the absorber structure contain InP quantum dots (QDs) as active material. In a v-shaped cavity using the semiconductor samples as end mirrors, a beta barium borate (BBO)(More)
The performance of a 665-nm GaInP disk laser operated continuous-wave at 15°C both in-well-pumped at 640 nm and barrier pumped at 532 nm is reported. The efficiency with respect to the absorbed power was enhanced by 3.5 times when using a 640-nm pump instead of a 532-nm pump. In-well pumping which is based on the absorption of the pump photons within the(More)
Es sollte gezeigt werden, welch machtvolles Werkzeug eine Analogie-Rechenanlage für die Arbeit des praktischen Ingenieurs und Physikers sein kann. Sie ist nicht nur ein Werkzeug, das uns gestattet, Gleichungen schneller zu lösen als bisher, sondern sie gibt uns auch die Möglichkeit, in der angewandten Forschung und in der Entwicklung die Entwürfe(More)
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