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Karl-Otto Velthaus
Karl-Otto Velthaus
Verified email at hhi.fraunhofer.de
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Cited by
Year
ZnO/CdS/CuInSe2 thin‐film solar cells with improved performance
L Stolt, J Hedström, J Kessler, M Ruckh, KO Velthaus, HW Schock
Applied Physics Letters 62 (6), 597-599, 1993
5301993
Luminescence properties of SrS:Ce3+
B Hüttl, U Troppenz, KO Velthaus, CR Ronda, RH Mauch
Journal of applied physics 78 (12), 7282-7288, 1995
761995
Solar cells based on CuIn (Se, S) 2
T Walter, A Content, KO Velthaus, HW Schock
Solar Energy Materials and Solar Cells 26 (4), 357-368, 1992
661992
Chemical bath deposition of CdS on CuInSe2, etching effects and growth kinetics
J Kessler, KO Velthaus, M Ruckh, R Laichinger, HW Schock, D Lincot, ...
Sixth Int. PVSEC, 1005-1010, 1992
631992
High efficiency SrS, SrSe: CeCl3 based thin film electroluminescent devices
RH Mauch, KO Velthaus, G Bilger, HW Schock
Journal of crystal growth 117 (1-4), 964-968, 1992
501992
1.55 μm Mach-Zehnder Modulators on InP for optical 40/80 Gbit/s transmission networks
HN Klein, H Chen, D Hoffmann, S Staroske, AG Steffan, KO Velthaus
2006 International Conference on Indium Phosphide and Related Materials …, 2006
492006
High performance InP-based Mach-Zehnder modulators for 10 to 100 Gb/s optical fiber transmission systems
KO Velthaus, M Hamacher, M Gruner, T Brast, R Kaiser, K Prosyk, ...
IPRM 2011-23rd International Conference on Indium Phosphide and Related …, 2011
352011
Multi-source reactive deposition process for the preparation of blue light emitting phosphor layers for AC TFEL devices
KO Velthaus, RH Mauch, TA Oberacker, HW Schock, SS Sun, ...
US Patent 5,505,986, 1996
351996
Tunable InP-based optical IQ modulator for 160 Gb/s
K Prosyk, T Brast, M Gruner, M Hamacher, D Hoffmann, R Millett, ...
European Conference and Exposition on Optical Communications, Th. 13. A. 5, 2011
342011
High performance 40ghz inp mach-zehnder modulator
K Prosyk, A Ait-Ouali, C Bornholdt, T Brast, M Gruner, M Hamacher, ...
Optical Fiber Communication Conference, OW4F. 7, 2012
332012
45 GHz bandwidth travelling wave electrode Mach-Zehnder modulator with integrated spot size converter
D Hoffmann, S Staroske, KO Velthaus
International Conference on Indium Phosphide and Related Materials, 585-588, 2004
302004
Monolithic optoelectronic TWE-component structure for high frequencies and low optical insertion loss
K Prosyk, R Kaiser, KO Velthaus
US Patent 9,182,546, 2015
262015
Flip-Chip Integration of InP and SiN
M Theurer, M Moehrle, A Sigmund, KO Velthaus, RM Oldenbeuving, ...
IEEE Photonics Technology Letters 31 (3), 273-276, 2019
222019
Flip-chip integration of InP to SiN photonic integrated circuits
M Theurer, M Moehrle, A Sigmund, KO Velthaus, RM Oldenbeuving, ...
Journal of Lightwave Technology 38 (9), 2630-2636, 2020
202020
Low switching voltage Mach–Zehnder modulator monolithically integrated with DFB laser for data transmission up to 107.4 Gb/s
S Lange, M Gruner, C Meuer, R Kaiser, M Hamacher, KO Velthaus, ...
Journal of Lightwave Technology 34 (2), 401-406, 2015
192015
SrS: Ce, Mn, Cl—a novel efficient EL phosphor
B Hüttl, KO Velthaus, U Troppenz, R Herrmann, RH Mauch
Journal of crystal growth 159 (1-4), 943-946, 1996
171996
Mach-Zehnder modulator arrangement and method for operating a Mach-Zehnder modulator arrangement
KO Velthaus
US Patent 9,140,957, 2015
162015
Electro-optical co-design to minimize power consumption of a 32 GBd optical IQ-transmitter using InP MZ-modulators
N Wolf, L Yan, JH Choi, T Kapa, S Wunsch, R Klotzer, KO Velthaus, ...
2015 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS), 1-4, 2015
142015
Chemical bath deposition of CdS on CuInSe_2 combining dry and wet processes for high efficiency thin film solar cells
D Lincot
Proc. 11th European Photovoltaic Solar Energy Conference, 1992, 870-873, 1992
141992
Low power InP-based monolithic DFB-laser IQ modulator with SiGe differential driver for 32-GBd QPSK modulation
S Lange, N Wolf, M Gruner, L Yan, R Kaiser, KO Velthaus, JH Choi, ...
Journal of Lightwave Technology 34 (8), 1678-1682, 2016
132016
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