Search
Rules for the search
- Only words with 2 or more characters are accepted
- Max 200 chars total
- Space is used to split words, "" can be used to search for a whole string (not indexed search then)
- AND, OR and NOT are prefix words, overruling the default operator
- +/|/- equals AND, OR and NOT as operators.
- All search words are converted to lowercase
High Efficiency, High Bandwidth Switch-Mode Envelope Tracking Supply Modulator
/en/research/publications/high-efficiency-high-bandwidth-switch-mode-envelope-tracking-supply-modulator
This paper presents a novel amplitude modulator concept for envelope tracking power amplifiers, which provides maximum efficiency in the lower output voltage ranges, thus nicely matching the…
L-Band Floating-Ground RF Power Amplifier for Reverse-Type Envelope Tracking Systems
/en/research/publications/l-band-floating-ground-rf-power-amplifier-for-reverse-type-envelope-tracking-systems
This paper presents a 50 W floating-ground RF power amplifier for L-Band applications. The amplifier is intended to be used in a reverse-type envelope tracking system with supply voltages of up…
High Output Power Ultra-Wideband Distributed Amplifier in InP DHBT Technology Using Diamond Heat Spreader
/en/research/publications/high-output-power-ultra-wideband-distributed-amplifier-in-inp-dhbt-technology-using-diamond-heat-spreader
This work reports on a highly linear and high output power ultra-wideband distributed amplifier with improved thermal properties using a diamond layer for heat spreading. The performances of a…
Broadband Driver Amplifier with Voltage Offset for GaN-based Switching PAs
/en/research/publications/broadband-driver-amplifier-with-voltage-offset-for-gan-based-switching-pas
The paper presents a GaN-based driver amplifier (PSA) module with potential shifting included, suitable for properly driving GaN-HEMTs with digital bit sequences in the microwave range. The PSA is…
Improved Efficiency of Ultraviolet B Light-Emitting Diodes with Optimized p-Side
/en/research/publications/improved-efficiency-of-ultraviolet-b-light-emitting-diodes-with-optimized-p-side
The effects of design and thicknesses of different optically transparent p-current spreading layers [short-period superlattice, superlattice (SL), and bulk p-Al0.38Ga0.62N] as well as the type and…
Kilowatt-class, High Duty Cycle, Passively Side-cooled 780 nm Diode Laser Stacks as Pumps for Pulsed MIR Lasers
/en/research/publications/kilowatt-class-high-duty-cycle-passively-side-cooled-780nbspnm-diode-laser-stacks-as-pumps-for-pulsed-mir-lasers
A 780nm diode laser pump source is presented that uses passive side-cooling to enable Kilowatt-class output at >10% duty cycle (10ms, 10Hz). Beam quality is M2<360 (BPP<90mm-mrad) and…
Narrow-band multiple-wavelengths DBR-ridge waveguide diode lasers customized for sensor applications
/en/research/publications/narrow-band-multiple-wavelengths-dbr-ridge-waveguide-diode-lasers-customized-for-sensor-applications
Monolithic narrow-band multi-wavelength stabilized diode lasers emitting between 760nm and 1064nm for direct sensor applications using Raman- or absorption spectroscopy, MIR upconverson imaging and…
Portable Shifted Excitation Raman Difference Spectroscopy - From Laboratory Investigations to in-situ Agri-Photonics
/en/research/publications/portable-shifted-excitation-raman-difference-spectroscopy-from-laboratory-investigations-to-in-situ-agri-photonics
Portable shifted excitation Raman difference spectroscopy (SERDS) will be presented using one-chip dual-wavelength Y-branch DBR diode laser at 785 nm as excitation source. Experimental results from…
Longitudinal Current Crowding as Power Limit in High Power 975 nm Diode Lasers
/en/research/publications/longitudinal-current-crowding-as-power-limit-in-high-power-975-nm-diode-lasers
Experiment and simulation of high power diode lasers reveals a longitudinally-varying current density profile, due to spatial hole-burning. Current crowding at the front facet increases with cavity…
A highly efficient GHz switching GaN-based synchronous buck converter module
/en/research/publications/a-highly-efficient-ghz-switching-gan-based-synchronous-buck-converter-module
The paper presents a highly efficient GaN-based synchronous buck converter suitable for switching in the lower GHz range. The module includes a very compact 2-stage GaN half-bridge converter MMIC…