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Assessment of high-power kW-class single-diode bars for use in highly efficient pulsed solid-state laser systems
/en/research/publications/assessment-of-high-power-kw-class-single-diode-bars-for-use-in-highly-efficient-pulsed-solid-state-laser-systems
In this work, we present measurements of efficiency-optimized 940 nm diode laser bars with long resonators that are constructed with robustly passivated output facets at the Ferdinand-Braun-Institut…
High power UV-B LEDs with long lifetime
/en/research/publications/high-power-uv-b-leds-with-long-lifetime
UV light emitters in the UV-B spectral range between 280 nm and 320 nm are of great interest for applications such as phototherapy, gas sensing, plant growth lighting, and UV curing. In this paper we…
Current spreading in UV-C LEDs emitting around 235 nm
/en/research/publications/current-spreading-in-uv-c-leds-emitting-around-235-nm
We present UV-C LEDs emitting around 235 nm grown by MOVPE on ELO AlN/sapphire substrates. In order to account for the low conductivity of high Al content AlGaN layers and the associated high contact…
Ultrashort pulse generation with semiconductor lasers using intracavity phase- and amplitude pulse shaping
/en/research/publications/ultrashort-pulse-generation-with-semiconductor-lasers-using-intracavity-phase-and-amplitude-pulse-shaping
We present intra-cavity pulse shaping of external cavity mode-locked semiconductor lasers. In our approach, a pulse shaper utilizing a dual LC-panel spatial light modulator is used in the cavity of a…
DBR grating stabilized ridge waveguide lasers emitting at 647 nm for real 3D holographic displays
/en/research/publications/dbr-grating-stabilized-ridge-waveguide-lasers-emitting-at-647-nm-for-real-3d-holographic-displays
Real 3D display applications require RGB light sources which provide a spectral bandwidth of less than 5 MHz for recording (and playing-back) a holographic film. Furthermore, these emitters must be…
400 mW output power at 445 nm with narrowband emission from an external cavity diode laser system
/en/research/publications/400-mw-output-power-at-445-nm-with-narrowband-emission-from-an-external-cavity-diode-laser-system
Recently, high-power broad-area laser diodes based on GaN with output powers beyond 1 W have become available. However, their broad spectral emission limits their applicability. Due to a lack of…
785 nm dual wavelength DBR diode lasers and MOPA systems with output powers up to 750 mW
/en/research/publications/785-nm-dual-wavelength-dbr-diode-lasers-and-mopa-systems-with-output-powers-up-to-750-mw
Raman lines are often superimposed by daylight, artificial light sources or fluorescence signals from the samples under study. Shifted excitation Raman difference spectroscopy (SERDS), i.e. exciting…
Generation of spectrally stable continuous-wave emission and ns pulses at 800 nm and 975 nm with a peak power of 4 W using a distributed Bragg reflector laser and a ridge-waveguide power amplifier
/en/research/publications/generation-of-spectrally-stable-continuous-wave-emission-and-ns-pulses-at-800-nm-and-975-nm-with-a-peak-power-of-4-w-using-a-distributed-bragg-reflector-laser-and-a-ridge-waveguide-power-amplifier
Semiconductor based sources which emit high-power spectrally stable nearly diffraction-limited optical pulses in the nanosecond range are ideally suited for a lot of applications, such as free-space…
975 nm high-peak power ns-diode laser based MOPA system suitable for water vapor DIAL applications
/en/research/publications/975-nm-high-peak-power-ns-diode-laser-based-mopa-system-suitable-for-water-vapor-dial-applications
Micro-DIAL (differential absorption LIDAR) systems require light sources with peak powers in the range of several 10 W together with a spectral line width smaller than the width of absorption lines…
Frequency doubling of near-infrared radiation enhanced by a multi-pass cavity for the second-harmonic wave
/en/research/publications/frequency-doubling-of-near-infrared-radiation-enhanced-by-a-multi-pass-cavity-for-the-second-harmonic-wave
In this work, we demonstrate frequency doubling of a DBR tapered diode laser operating around 1064 nm in a nonlinear bulk crystal enhanced by a multi-pass cavity resonant for the generated green…