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Growth and Properties of Intentionally Carbon-Doped GaN Layers
/forschung/publikationen/growth-and-properties-of-intentionally-carbon-doped-gan-layers
Carbon-doping of GaN layers with thickness in the mm-range is performed by hydride vapor phase epitaxy. Characterization by optical and electrical measurements reveals semi-insulating behavior with a…
Designing sapphire surface patterns to promote AlGaN overgrowth in hydride vapor phase epitaxy
/forschung/publikationen/designing-sapphire-surface-patterns-to-promote-algan-overgrowth-in-hydride-vapor-phase-epitaxy
Lateral overgrowth of patterned c-plane oriented sapphire substrates(PSS) with AlGaN using hydride vapor phase epitaxy was investigated with focus on how to suppress parasitic non c-planar…
Highly Efficient High-Brightness 970nm Ridge Waveguide Lasers
/forschung/publikationen/highly-efficient-high-brightness-970nm-ridge-waveguide-lasers
In this letter we present new results on high power 970 nm ridge waveguide lasers based on an extreme double asymmetric epitaxial design. Due to an improved lateral-longitudinal design an…
Generalization of coupled S-parameter calculation to compute beam impedances in particle accelerators
/forschung/publikationen/generalization-of-coupled-s-parameter-calculation-to-compute-beam-impedances-in-particle-accelerators
In this article, a decomposition approach for the computation of beam coupling impedances is proposed. This approach can account for the mutual electromagnetic coupling in long accelerator structures…
Theoretical studies of the generation of picoseconds pulses with two-section blueviolet semiconductor lasers
/forschung/publikationen/theoretical-studies-of-the-generation-of-picoseconds-pulses-with-two-section-blueviolet-semiconductor-lasers
We report the results of theoretical investigations of the generation of sub-10 ps pulses by a blue-violet InGaN two-section laser. The principle of pulse generation is active Q-switching. We…
Surface Bragg gratings for high brightness lasers
/forschung/publikationen/surface-bragg-gratings-for-high-brightness-lasers
Surface Bragg gratings for high brightness lasers J. Fricke, H. Wenzel, O. Brox, P. Crump, B. Sumpf, K. Paschke, M. Matalla, G. Erbert, A. Knigge, and…
Micro-integrated dual-wavelength ridge-waveguide master oscillator power amplifier with an optical output power of 0.5 W at 785 nm
/forschung/publikationen/micro-integrated-dual-wavelength-ridge-waveguide-master-oscillator-power-amplifier-with-an-optical-output-power-of-05-w-at-785-nm
Micro-integrated dual-wavelength ridge-waveguide master oscillator power amplifier with an optical output power of 0.5 W at 785 nm A. Müller, M. Maiwald, B. Sumpf …
A brief history of kilowatt-class diode-laser bars
/forschung/publikationen/a-brief-history-of-kilowatt-class-diode-laser-bars
A brief history of kilowatt-class diode-laser bars P. Crump, G. Tränkle Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Str. 4,…
Investigation of 48 emitter DBR laser bars under nanosecond high-peak current excitation
/forschung/publikationen/investigation-of-48-emitter-dbr-laser-bars-under-nanosecond-high-peak-current-excitation
Investigation of 48 emitter DBR laser bars under nanosecond high-peak current excitation H. Christopher, A. Klehr, J. Fricke, A. Liero, H. Wenzel, A. Knigge, and…
Traveling wave model-based analysis of tapered broad-area lasers
/forschung/publikationen/traveling-wave-model-based-analysis-of-tapered-broad-area-lasers
Traveling wave model-based analysis of tapered broad-area lasers J.-P. Koestera, M. Radziunasb, A. Zeghuzia, H. Wenzela, A. Kniggea a Ferdinand-Braun-Institut,…