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Polarization of eigenmodes in laser diode waveguides on semipolar and nonpolar GaN
/forschung/publikationen/polarization-of-eigenmodes-in-laser-diode-waveguides-on-semipolar-and-nonpolar-gan
Recent calculations of the eigenmodes in waveguides grown on semipolar GaN suggest that the optical polarization of the emitted light as well as the optical gain depends on the orientation of the…
Non-thermal atmospheric pressure HF plasma source: generation of nitric oxide and ozone for bio-medical applications
/forschung/publikationen/non-thermal-atmospheric-pressure-hf-plasma-source-generation-of-nitric-oxide-and-ozone-for-bio-medical-applications
A new miniature high-frequency (HF) plasma source intended for bio-medical applications is studied using nitrogen/oxygen mixture at atmospheric pressure. This plasma source can be used as an element…
Improving the stability of distributed-feedback tapered master-oscillator power-amplifiers
/forschung/publikationen/improving-the-stability-of-distributed-feedback-tapered-master-oscillator-power-amplifiers-1
We report theoretical results on the wavelength stabilization in distributedfeedback master-oscillator power-amplifiers which are compact semiconductor laser devices capable of emitting a high…
Efficient second-harmonic generation using a semiconductor tapered amplifier in a coupled ring-resonator geometry
/forschung/publikationen/efficient-second-harmonic-generation-using-a-semiconductor-tapered-amplifier-in-a-coupled-ring-resonator-geometry
A new approach for efficient second-harmonic generation using diode lasers is presented. The experimental setup is based on a tapered amplifier operated in a ring resonator that is coupled to a…
23 W peak power picosecond pulses from a single-stage all-semiconductor master oscillator power amplifier
/forschung/publikationen/23nbspw-peak-power-picosecond-pulses-from-a-single-stage-all-semiconductor-master-oscillator-power-amplifier
Using a single-stage all-semiconductor master oscillator-power amplifier, we generate narrow-band laser pulses of 23 W peak power at 1063 nm wavelength. These pulses of 40 ps length…
High-power distributed Bragg reflector ridge-waveguide diode laser with very small spectral linewidth
/forschung/publikationen/high-power-distributed-bragg-reflector-ridge-waveguide-diode-laser-with-very-small-spectral-linewidth
We manufactured and investigated distributed Bragg reflector ridge-waveguide diode lasers having sixthorder surface gratings and an emission wavelength around 974 nm. The single-mode output…
Temperature and excitation power dependent photoluminescence intensity of GaInN quantum wells with varying charge carrier wave function overlap
/forschung/publikationen/temperature-and-excitation-power-dependent-photoluminescence-intensity-of-gainn-quantum-wells-with-varying-charge-carrier-wave-function-overlap
For the realization and the improvement of GaN-based optoelectronic devices (light emitting diodes and laser diodes) emitting from the ultraviolet to the red wavelength range GaInN quantum well…
Diode-pumped mode-locked Yb:LuScO3 single crystal laser with 74 fs pulse duration
/forschung/publikationen/diode-pumped-mode-locked-yblusco3-single-crystal-laser-with-74nbspfs-pulse-duration
The mode locking of the mixed sesquioxide single crystal Yb:LuScO3 is demonstrated. This crystal is locally disordered and has the broadest emission spectrum of all sesquioxides known so far. Pulse…
Boule-like growth of GaN by HVPE
/forschung/publikationen/boule-like-growth-of-gan-by-hvpe
GaN substrates are indispensable for fabrication of blue laser diodes. Growth and cutting of HVPE grown GaN boules is currently the most promising route for cost-efficient supply of 2 inch c-plane…
High-Power 980-nm Broad-Area Lasers Spectrally Stabilized by Surface Bragg Gratings
/forschung/publikationen/high-power-980-nm-broad-area-lasers-spectrally-stabilized-by-surface-bragg-gratings
We report on broad-area distributed Bragg reflector (DBR) lasers with a stripe width of 90 µm providing up to 14-W optical power and 50% maximum conversion efficiency. Ninety-five percent of the…