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Separate phase-locking and coherent combining of two laser diodes in a Michelson cavity
/forschung/publikationen/separate-phase-locking-and-coherent-combining-of-two-laser-diodes-in-a-michelson-cavity
We describe a new coherent beam combining architecture based on passive phase-locking of two laser diodes in a Michelson external cavity on their rear facet, and their coherent combination on the…
Progress in high-energy-class diode laser pump sources
/forschung/publikationen/progress-in-high-energy-class-diode-laser-pump-sources
A new generation of diode-pumped high-energy-class solid-state laser facilities is in development that generate multijoule pulse energies at around 10 Hz. Currently deployed quasi-continuous-wave…
Watt-level continuous-wave diode lasers at 1180 nm with high spectral brightness
/forschung/publikationen/watt-level-continuous-wave-diode-lasers-at-1180-nm-with-high-spectral-brightness
Distributed Bragg reflector (DBR) tapered lasers emitting near 1180 nm were developed. The integration of DBR surface gratings in an edge-emitting laser structure with a highly strained quantum well…
Coupling of a high-power tapered diode laser beam into a single-mode-fiber within a compact module
/forschung/publikationen/coupling-of-a-high-power-tapered-diode-laser-beam-into-a-single-mode-fiber-within-a-compact-module
In this work, coupling of radiation generated by a distributed Bragg reflector (DBR) tapered diode laser around 1064 nm into a single-mode-fiber (SMF) within a butterfly module with a footprint <…
Assessment of high-power kW-class single-diode bars for use in highly efficient pulsed solid-state laser systems
/forschung/publikationen/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
/forschung/publikationen/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
/forschung/publikationen/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
/forschung/publikationen/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
/forschung/publikationen/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
/forschung/publikationen/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…