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Prototype of a compact rubidium-based optical frequency reference for operation on nanosatellites
/en/research/publications/prototype-of-a-compact-rubidium-based-optical-frequency-reference-for-operation-on-nanosatellites
Space-borne optical frequency references based on spectroscopy of atomic vapors may serve as an integral part of compact optical atomic clocks, which can advance global navigation systems or can be…
Origin of defect luminescence in ultraviolet emitting AlGaN diode structures
/en/research/publications/origin-of-defect-luminescence-in-ultraviolet-emitting-algan-diode-structures
Light emitting diode structures emitting in the ultraviolet spectral range are investigated. The samples exhibit defect luminescence bands. Synchrotron-based photoluminescence excitation spectroscopy…
Novel 900 nm diode lasers with epitaxially stacked multiple active regions and tunnel junctions
/en/research/publications/novel-900-nm-diode-lasers-with-epitaxially-stacked-multiple-active-regions-and-tunnel-junctions
A multi-active-region bipolar-cascade edge-emitting laser emitting at nearly 900 nm is presented. The three active regions and two tunnel junctions located in a single waveguide core share the…
A 52-58 GHz Power Amplifier With 18.6-dBm Saturated Output Power for Space Applications
/en/research/publications/a-52-58-ghz-power-amplifier-with-186-dbm-saturated-output-power-for-space-applications
This brief presents a 52-58 GHz power amplifier (PA) with constant output power across the entire band. A new topology based on the impedance transformation of transmission lines was adopted as the…
The patterning toolbox FIB-o-mat: Exploiting the full potential of focused helium ions for nanofabrication
/en/research/publications/the-patterning-toolbox-fib-o-mat-exploiting-the-full-potential-of-focused-helium-ions-for-nanofabrication
Focused beams of helium ions are a powerful tool for high-fidelity machining with spatial precision below 5 nm. Achieving such a high patterning precision over large areas and for different…
Electrical and optical characteristics of highly transparent MOVPE-grown AlGaN-based tunnel heterojunction LEDs emitting at 232 nm
/en/research/publications/electrical-and-optical-characteristics-of-highly-transparent-movpe-grown-algan-based-tunnel-heterojunction-leds-emitting-at-232-nm
We present the growth and electro-optical characteristics of highly transparent AlGaN-based tunnel heterojunction light-emitting diodes (LEDs) emitting at 232 nm entirely grown by metalorganic…
Comb injection into a single-mode laser
/en/research/publications/comb-injection-into-a-single-mode-laser
Temporally- and spectrally-resolved phase and intensity emission characteri-zation of amplitude-modulated optical frequency comb generation and phase noise transfer of an initially single mode laser…
Laser Diodes as Reliable Pump Source for Space-Borne Methane Remote Sensing Lidar System
/en/research/publications/laser-diodes-as-reliable-pump-source-for-space-borne-methane-remote-sensing-lidar-system
Laser diode minibars for QCW pumping Nd:YAG at 63 W were developed for the satellite MERLIN and subjected to accelerated life test. Evaluating 320 single emitters indicates a reliability of…
Ultra-narrow linewidth GaAs-based DBR Lasers
/en/research/publications/ultra-narrow-linewidth-gaas-based-dbr-lasers-1
We present a novel approach for GaAs-based DBR diode lasers with an extended cavity. The developed chips exhibit a record small 3 dB linewidth of 25 kHz @ 1 ms at the wavelength…
Wedged Nd:YVO4 crystal for wavelength tuning of monolithic passively Q-switched picosecond microchip lasers
/en/research/publications/wedged-ndyvo4-crystal-for-wavelength-tuning-of-monolithic-passively-q-switched-picosecond-microchip-lasers
We present a monolithic integrated passively Q-switched sub-150 ps microchip laser at 1064 nm with a wedged Nd:YVO4 crystal operating up to a repetition rate of 1 MHz. The wedge…