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First 1.4 kW diode laser pump module emitting at 780 nm for high duty cycle pulsed MIR lasers
/forschung/forschungsnews/first-14-kw-diode-laser-pump-module-emitting-at-780-nm-for-high-duty-cycle-pulsed-mir-lasers
Novel kW-class 780 nm pump modules with near symmetric beam quality have been demonstrated, suited for high repetition rate, long-pulse applications, without micro-channel coolers – a key enabling…
Filling the gap – potential shifting driver amplifier suited to complete digital GaN-based signal chains
/forschung/forschungsnews/filling-the-gap-potential-shifting-driver-amplifier-suited-to-complete-digital-gan-based-signal-chains
FBH has developed a potential shifting driver amplifier. The compact module contains a novel inhouse GaN driver chip. It delivers a voltage gain of about 11 at a usual GaN-HEMT input load and…
Improved reliability of UVC LEDs and better understanding of degradation processes
/forschung/forschungsnews/improved-reliability-of-uvc-leds-and-better-understanding-of-degradation-processes
FBH and its partner TU Berlin have succeeded in significantly increasing the lifetime of its UVC LEDs to beyond 10,000 h by using AlN base layers of high crystalline quality. Crucial for this…
Optimization of epitaxial growth based on photoluminescence
/forschung/forschungsnews/optimization-of-epitaxial-growth-based-on-photoluminescence
Photoluminescence (PL) is sensitive on various characteristics of III-V semiconductors which are related to conductivity and light generation efficiency. The materials analytics group at FBH uses…
Traceability for electrical measurements at millimeter-wave and terahertz frequencies
/forschung/forschungsnews/collaboration-of-european-metrology-institutes-with-fbh-to-establish-traceability-for-electrical-measurements-at-millimeter-wave-and-terahertz-frequencies
Together with European partners, the FBH is developing reliable techniques for on-wafer measurements to cover frequencies from 110 GHz to 1,100 GHz. This is an important contribution…
Novel tapered RW lasers for high-power LiDAR applications
/forschung/forschungsnews/novel-tapered-rw-lasers-for-high-power-lidar-applications-emitting-short-pulses-with-excellent-brightness
FBH scientists show 3.3 ns long pulse operation with more than 18 W output power and an excellent brightness from novel tapered-ridge-waveguide lasers. Such lasers generating…
Direct Pumping of Quantum Wells Improves Performance of Semiconductor Thin-Disk Lasers
/forschung/publikationen/direct-pumping-of-quantum-wells-improves-performance-of-semiconductor-thin-disk-lasers
Quantum-well-pumped semiconductor thin-disk lasers combine the thermal advantages of rare-earth thin-disk lasers and the frequency flexibility of semiconductor lasers.
Effect of electric field on the probability of optical transitions in InGaAs/GaAs quantum wells observed by photo- and electroreflectance methods
/forschung/publikationen/effect-of-electric-field-on-the-probability-of-optical-transitions-in-ingaasgaas-quantum-wells-observed-by-photo-and-electroreflectance-methods
The influence of an electric field on the energy spectrum and the probability of optical transitions in InGaAs/GaAs single quantum wells (QWs) of different widths has been investigated with photo-…
Thin-film microstrip lines and coplanar waveguides on semiconductor substrates for sub-mm wave frequencies
/forschung/publikationen/thin-film-microstrip-lines-and-coplanar-waveguides-on-semiconductor-substrates-for-sub-mm-wave-frequencies
It is shown that both thin-film microstrip lines (TFMSLs) and miniaturized coplanar waveguides (CPWs) offer low-dispersive propagation properties up to 1 THz. At the same time, they are fully…
Nonresonant tunneling carrier transfer in bilayer asymmetric InAs/GaAs quantum dots
/forschung/publikationen/nonresonant-tunneling-carrier-transfer-in-bilayer-asymmetric-inasgaas-quantum-dots
Carrier transfer in InAs/GaAs asymmetric quantum dot pairs has been studied by means of continuous-wave and time-resolved photoluminescence in a bilayer InAs/GaAs quantum dots system. The dependence…