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Compact high-current diode laser nanosecond-pulse source with high efficiency and 13 µJ output energy
/forschung/publikationen/compact-high-current-diode-laser-nanosecond-pulse-source-with-high-efficiency-and-13nbspuj-output-energy
A compact gain-switched nanosecond diode laser pulse source at 920 nm with an output energy of 13 µJ is presented. The developed nanosecond electronic driver is based on GaN transistors and…
Top- and bottom-illumination of solar-blind AlGaN metal-semiconductor-metal photodetectors
/forschung/publikationen/top-and-bottom-illumination-of-solar-blind-algan-metal-semiconductor-metal-photodetectors
The spectral performance of solar-blind AlxGa1-xN based metal-semiconductor-metal ultra-violet photodetectors has been measured for top- as well as bottom-illumination at different bias voltages. In…
In-situ photoluminescence measurements during MOVPE growth of GaN and InGaN MQW structures
/forschung/publikationen/in-situ-photoluminescence-measurements-during-movpe-growth-of-gan-and-ingan-mqw-structures
In this work we report the first quasi-continuous in-situ photoluminescence study of growing InGaN LED structures inside an industrial-grade metal-organic vapor phase epitaxy (MOVPE) reactor at…
Numerical and experimental investigations of micro-integrated external cavity diode lasers
/forschung/publikationen/numerical-and-experimental-investigations-of-micro-integrated-external-cavity-diode-lasers
We report the results of numerical and experimental investigations of the electrooptical behaviour of an external cavity diode laser device composed of a semiconductor laser and a distant Bragg…
Study of Microintegrated External-Cavity Diode Lasers: Simulations, Analysis, and Experiments
/forschung/publikationen/study-of-microintegrated-external-cavity-diode-lasers-simulations-analysis-and-experiments
This paper reports the results of numerical and experimental investigations of the dynamics of an external-cavity diode laser device composed of a semiconductor laser and an external Bragg grating,…
Efficient generation of 509 nm light by sum-frequency mixing between two tapered diode lasers
/forschung/publikationen/efficient-generation-of-509nbspnm-light-by-sum-frequency-mixing-between-two-tapered-diode-lasers
We demonstrate a concept for visible laser sources based on sum-frequency generation of beam combined tapered diode lasers. In this specific case, a 1.7 W sum-frequency generated green laser at…
Gain-Matched Output Couplers for Efficient Kerr-Lens Mode-Locking of Low-Cost and High-Peak Power Cr:LiSAF Lasers
/forschung/publikationen/gain-matched-output-couplers-for-efficient-kerr-lens-mode-locking-of-low-cost-and-high-peak-power-crlisaf-lasers
We present a detailed investigation of Kerr-lens mode-locking in diode-pumped Cr:LiSAF lasers employing gainmatched output couplers (GMOCs). Single-mode diodes (660 nm, 130 mW) and tapered…
Effect of heterostructure design on carrier injection and emission characteristics of 295nm light emitting diodes
/forschung/publikationen/effect-of-heterostructure-design-on-carrier-injection-and-emission-characteristics-of-295nm-light-emitting-diodes
The effects of the heterostructure design on the injection efficiency and external quantum efficiency of ultraviolet (UV)-B light emitting diodes (LEDs) have been investigated. It was found that the…
Temperature induced degradation of InAlGaN multiple-quantum well UV-B LEDs
/forschung/publikationen/temperature-induced-degradation-of-inalgan-multiple-quantum-well-uv-b-leds
The reliability of InAlGaN multiple quantum well LEDs emitting around 308 nm has been investigated. The UV-B LEDs were stressed at constant current and current density, while the heat sink…
Ultra-narrow linewidth DFB-laser with optical feedback from a monolithic confocal Fabry-Perot cavity
/forschung/publikationen/ultra-narrow-linewidth-dfb-laser-with-optical-feedback-from-a-monolithic-confocal-fabry-perot-cavity
We present a compact, ultra-narrow-linewidth semiconductor laser based on a 780 nm distributed feedback diode laser optically selflocked to a mode of an external monolithic confocal Fabry-Perot…