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Low-Frequency Noise in Nonlinear Systems
/forschung/publikationen/low-frequency-noise-in-nonlinear-systems
Excess noise degrades circuit performance in linear and nonlinear operation. The linear case, obviously, is much easier to analyze, understand, and model. Things get much more involved when nonlinear…
Optimization of InGaN/(In,Al,Ga)N based near UV-LEDs by MQW strain balancing with in-situ wafer bow sensor
/forschung/publikationen/optimization-of-inganinalgan-based-near-uv-leds-by-mqw-strain-balancing-with-in-situ-wafer-bow-sensor
A high resolution curvature sensor was used for in-situ monitoring of the strain state during the growth of the InGaN multiple- quantum-well (MQW) for near UV light emitting diodes (LEDs). The LED…
Emission characteristics of InGaN multi quantum well light emitting diodes with differently strained InAlGaN barriers
/forschung/publikationen/emission-characteristics-of-ingan-multi-quantum-well-light-emitting-diodes-with-differently-strained-inalgan-barriers
In this paper we report on the emission characteristics of In- GaN multi quantum well light emitting diodes (LEDs) in the near ultra-violet (UV) spectral range. GaN, AlGaN and InAl- GaN with various…
InGaAs-AlGaAs Disk Laser Generating sub-220-fs Pulses and Tapered Diode Amplifier with Ultrafast Pulse Picking
/forschung/publikationen/ingaas-algaas-disk-laser-generating-sub-220-fs-pulses-and-tapered-diode-amplifier-with-ultrafast-pulse-picking
The femtosecond regime of mode-locked InGaAs/AlGaAs disk lasers was investigated, resulting in almost chirpfree sub-220-fs pulses. Pulse picking using a tapered diode amplifier is demonstrated,…
Passively Mode-Locked Yb:LuScO3 Oscillator
/forschung/publikationen/passively-mode-locked-yblusco3-oscillator
Mode locking of the novel mixed sesquioxide crystal Yb:LuScO3 employing a SESAM is demonstrated. Pulse durations as short as 111 fs were obtained using a diode-laser pump source.
55 W peak power from 1100 nm wavelength 60 µm broad-area laser diodes enabled by reduced carrier accumulation in the waveguide
/forschung/publikationen/55nbspw-peak-power-from-1100nbspnm-wavelength-60nbspum-broad-area-laser-diodes-enabled-by-reduced-carrier-accumulation-in-the-waveguide
Optical power from 1100 nm broad-area laser diodes is found to be limited by the accumulation of minority carriers in the waveguide layer, caused by a small effective barrier between the quantum…
MOVPE growth of InGaAs/GaAsP-MQWs for high-power laser diodes studied by reflectance anisotropy spectroscopy
/forschung/publikationen/movpe-growth-of-ingaasgaasp-mqws-for-high-power-laser-diodes-studied-by-reflectance-anisotropy-spectroscopy
We have intensively studied the growth and strain behaviour of InxGa1-xAs multi-quantum wells (MQWs) for application in high-power laser diodes. Their growth in metal-organic vapour-phase epitaxy…
Assessment of the limits to peak power of 1100nm broad area single emitter diode lasers under short pulse conditions
/forschung/publikationen/assessment-of-the-limits-to-peak-power-of-1100nm-broad-area-single-emitter-diode-lasers-under-short-pulse-conditions-1
High power diode lasers are the root source of optical energy in all high performance laser systems. As their performance advances, diode lasers are increasingly taking the place of other sources.…
20W continuous wave reliable operation of 980nm broad-area single emitter diode lasers with an aperture of 96µm
/forschung/publikationen/20w-continuous-wave-reliable-operation-of-980nm-broad-area-single-emitter-diode-lasers-with-an-aperture-of-96um
High power broad area diode lasers provide the optical energy for all high performance solid state and fiber laser systems. The maximum achievable power density from such systems is limited at source…
Twin-Contact 645-nm Tapered Laser With 500-mW Output Power
/forschung/publikationen/twin-contact-645-nm-tapered-laser-with-500-mw-output-power
High brightness tapered lasers emitting around 650 nm were developed. We realized 2-mm-long devices with 750-µm straight section, 1250-µm tapered section, and 4° taper angle. The input currents into…