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975-nm high-power broad area diode lasers optimized for narrow spectral linewidth applications
/forschung/publikationen/975-nm-high-power-broad-area-diode-lasers-optimized-for-narrow-spectral-linewidth-applications
Many pumping and direct diode applications of high power diode lasers require sources that operate within a narrow (<1nm) temperature stable spectral line. The natural linewidth of high power…
High-brightness 635 nm tapered diode lasers with optimized index guiding
/forschung/publikationen/high-brightness-635-nm-tapered-diode-lasers-with-optimized-index-guiding
In this work, we present tapered diode lasers (TPL) emitting near 635 nm with an optimized lateral structure. To improve the beam quality as well as the output power, we varied the width of the…
High-power distributed-feedback tapered master-oscillator power amplifiers emitting at 1064 nm
/forschung/publikationen/high-power-distributed-feedback-tapered-master-oscillator-power-amplifiers-emitting-at-1064nbspnm
In this work, we investigate experimentally optimized monolithic distributed-feedback (DFB) tapered master-oscillator power amplifiers (MOPA). The devices consist of three autonomously driven…
The analysis of factors limiting the maximum output power of broad-area laser diodes
/forschung/publikationen/the-analysis-of-factors-limiting-the-maximum-output-power-of-broad-area-laser-diodes
The causes for the saturation of both the continuous-wave and the pulsed output power of broad-area laser diodes driven at very high currents are investigated experimentally and theoretically. The…
Experimental and numerical study of Distributed-Bragg-Reflector tapered lasers
/forschung/publikationen/experimental-and-numerical-study-of-distributed-bragg-reflector-tapered-lasers
We report results on experimental and numerical investigations of the output characteristics of edge-emitting distributed Bragg reflector tapered diode lasers emitting around 980 nm. The…
975 nm high power diode lasers with high efficiency and narrow vertical far field enabled by low index quantum barriers
/forschung/publikationen/975nbspnm-high-power-diode-lasers-with-high-efficiency-and-narrow-vertical-far-field-enabled-by-low-index-quantum-barriers
For optimal coupled power into fiber, high power diode lasers should operate efficiently with smallest possible vertical far field emission angle. Although waveguide and cladding layers can be…
On the Recovery Time of Highly Robust Low-Noise Amplifiers
/forschung/publikationen/on-the-recovery-time-of-highly-robust-low-noise-amplifiers
Recently, GaN-based low-noise amplifiers (LNAs) were shown to provide high ruggedness together with low noise figure. Since no limiter is required to protect the input, these LNAs allow for…
Conductively Cooled 1 kW-QCW Diode Laser Stacks Enabling Simple Fiber Coupling
/forschung/publikationen/conductively-cooled-1nbspkw-qcw-diode-laser-stacks-enabling-simple-fiber-coupling
A new mini-bar design densely packed with 13 emitters in a 1.6 mm aperture has been developed. These minibars deliver >200 W output. With a very low divergence of 95% power enclosed in…
Finite element simulation of the optical modes of semiconductor lasers
/forschung/publikationen/finite-element-simulation-of-the-optical-modes-of-semiconductor-lasers
In the present paper we investigate optical near fields in semiconductor lasers. We perform finite element simulations for two different laser types, namely a super large optical waveguide (SLOW)…
High-Brightness 980-nm Tapered Laser - Optimization of the Laser Rear Facet
/forschung/publikationen/high-brightness-980-nm-tapered-laser-optimization-of-the-laser-rear-facet
We present experimental results on a gain-guided tapered diode laser with rear facet coating variation from 98% down to 5% reflectivity. We show that in comparison to the common high reflection…