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Highly Asymmetric Epitaxial Designs for Increased Power and Efficiency in kW-Class GaAs-Based Diode Laser Bars
/forschung/publikationen/highly-asymmetric-epitaxial-designs-for-increased-power-and-efficiency-in-kw-class-gaas-based-diode-laser-bars
1-cm single quantum well laser bars at 910-940nm wavelengths are presented, using extremely asymmetric layer designs for increased power. In quasi-CW testing, bars with 4mm resonators provide output…
Stability of ZnSe-passivated laser facets cleaved in air and in ultra-high vacuum
/forschung/publikationen/stability-of-znse-passivated-laser-facets-cleaved-in-air-and-in-ultra-high-vacuum
Single-mode 1064 nm ridge-waveguide lasers with double and triple quantum wells are used to compare the facet stability of ultra-high vacuum cleaved and ZnSe-passivated lasers with air-cleaved,…
Investigations on Operational Reliability of 808 nm QCW Laser Diode Half-Bars for Space-Borne Applications
/forschung/publikationen/investigations-on-operational-reliability-of-808-nm-qcw-laser-diode-half-bars-for-space-borne-applications
Laser diode half-bars with 16 emitters were manufactured and qualified for pulsed high-power operation on the satellite MERLIN. Stress accelerated life tests of 20 laser half-bars were performed for…
970 nm DBR Broad-Area Semiconductor Lasers with 60% Conversion Efficiency
/forschung/publikationen/970-nm-dbr-broad-area-semiconductor-lasers-with-60-conversion-efficiency
Progress in epitaxial design to enhance power and efficiency of spectrally-stabilized broad-area lasers at operating wavelength 970nm is presented. 200µm wide and 4mm long DBR lasers with a…
Diode Lasers with Internal Wavelength Stabilization for LiDAR Applications
/forschung/publikationen/diode-lasers-with-internal-wavelength-stabilization-for-lidar-applications
The development of diode lasers with internal wavelength stabilization and powered by inhouse electrical drivers generating 2ns to 10ns long electrical pulses is reviewed. Different power classes…
The impact of longitudinal spatial hole burning on the carrier density profile in high-power lasers
/forschung/publikationen/the-impact-of-longitudinal-spatial-hole-burning-on-the-carrier-density-profile-in-high-power-lasers
Spatially resolved spontaneous emission intensity and spectrum were used to demonstrate the longitudinal-spatial-hole-burning (LSHB)-induced non-uniform carrier density along the resonator in high…
Internally wavelength stabilized GaAs-based diode lasers with epitaxially-stacked multiple active regions and tunnel junctions for LiDAR applications
/forschung/publikationen/internally-wavelength-stabilized-gaas-based-diode-lasers-with-epitaxially-stacked-multiple-active-regions-and-tunnel-junctions-for-lidar-applications
We present a bipolar-cascade distributed-Bragg reflector laser emitting near 905 nm with a high slope efficiency. The wavelength stabilization by a surface grating was achieved by placing three…
Efficiency optimization of high-power GaAs lasers by balancing confinement and threshold
/forschung/publikationen/efficiency-optimization-of-high-power-gaas-lasers-by-balancing-confinement-and-threshold
Studies balancing modal gain (confinement) and facet reflectivity in high power 940 nm lasers using extreme-triple-asymmetric epitaxial designs enable > 70% efficiency at 12 W…
Narrow lateral far field divergence obtained with spatially modulated broad-area lasers
/forschung/publikationen/narrow-lateral-far-field-divergence-obtained-with-spatially-modulated-broad-area-lasers
A laser design combining longitudinal-lateral gain-loss modulation with additional phase tailoring is presented. Under pulsed operation simulations predict a single-lobed far field angle of…
Theoretical Study of the Behavior of a DBR Laser Subject to External Optical Feedback
/forschung/publikationen/theoretical-study-of-the-behavior-of-a-dbr-laser-subject-to-external-optical-feedback-1
We report results of the theoretical study of the dynamic properties of distributed Bragg reflector (DBR) lasers subject to an external optical feedback provided by a longdistance mirror. We adapt…