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A. Maassdorf
Researcher at Ferdinand-Braun-Institut
Publications - 23
Citations - 430
A. Maassdorf is an academic researcher from Ferdinand-Braun-Institut. The author has contributed to research in topics: Laser & Diode. The author has an hindex of 7, co-authored 23 publications receiving 366 citations. Previous affiliations of A. Maassdorf include Leibniz Association.
Papers
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Journal ArticleDOI
Efficient High-Power Laser Diodes
Paul Crump,G. Erbert,H. Wenzel,C. Frevert,C. M. Schultz,K.-H. Hasler,R. Staske,Bernd Sumpf,A. Maassdorf,F. Bugge,S. Knigge,G. Trankle +11 more
TL;DR: In this paper, a review of efforts to increase ηE is presented and it is shown that for well-optimized structures, the residual losses are dominated by the p-side waveguide and nonideal internal quantum efficiency.
Journal ArticleDOI
Advanced thin film technology for ultrahigh resolution X-ray microscopy.
Joan Vila-Comamala,Konstantins Jefimovs,Jörg Raabe,Tero Pilvi,Rainer H. Fink,Mathias Senoner,A. Maassdorf,Mikko Ritala,Christian David +8 more
TL;DR: F Fresnel zone plates were fabricated by combining electron-beam lithography with atomic layer deposition and focused ion beam induced deposition and for the first time in X-ray microscopy, features below 10nm in width were resolved.
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Narrow Stripe Broad Area Lasers With High Order Distributed Feedback Surface Gratings
TL;DR: In this article, a GaAs-based narrow-stripe broad-area laser with integrated surface gratings is shown to operate with high power and efficiency, low beam parameter product (BPP), and narrow spectra.
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17-W Near-Diffraction-Limited 970-nm Output From a Tapered Semiconductor Optical Amplifier
Xiaozhuo Wang,G. Erbert,Hans Wenzel,Paul Crump,Bernd Eppich,S. Knigge,Peter Ressel,A. Ginolas,A. Maassdorf,G. Trankle +9 more
TL;DR: In this article, the authors compared the influence of lateral geometric design on amplifier performance by using devices with super large optical waveguide (4.8 μm) and relative low confinement factor (Γ = 1%).
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Wavelength stabilized high pulse power 48 emitter laser bars for automotive light detection and ranging application
Andreas Klehr,Armin Liero,Heike Christopher,Hans Wenzel,A. Maassdorf,Pietro Della Casa,J. Fricke,Arnim Ginolas,Andrea Knigge +8 more
TL;DR: In this article, an internally wavelength stabilized distributed Bragg reflector (DBR) broad area (BA) laser bar with 48 emitters is presented, which is specifically optimized for wavelength-stabilized pulsed operation applying a surface Bragg grating with high reflectivity.