Kunkel, R., Hoffmann, D., Weinert, C.M., Molina-Fernandez, I., Halir, R.
A monolithically integrated InP 90° hybrid incorporating waveguide balanced photodiodes is presented. Stable performance is achieved over a wavelength range from 1530 nm to 1565 nm.
Continuous wave terahertz systems exploiting 1.5 µm telecom technologies (2009)
Sartorius, B., Schlak, M., Stanze, D., Roehle, H., Künzel, H., Schmidt, D., ...
A fiber-assembled CW THz System operating at 1.5 mu m is presented. High speed telecom photodiodes integrated with planar THz antennas serve as THz emitters with power up to 10 mu W. Photoconductive...
Kunkel, R., Mekonnen, G.G., Pech, D., Rosin, T., Schmidt, D., ...
The integration potential of waveguide-integrated photodiodes is demonstrated by a novel broadband self-powered photodetector with 72 GHz bandwidth, greater-than 55 dBd. dynamical range, and a...
Unterborsch, G., Kroh, M., Honecker, J., Steffan, A.G., Tsianos, G., ...
A DPSK receiver concept using flipchip hybrid integration of InP photodetectors on SOI boards with optical decoder is presented. Horizontal waveguiding enables low-cost production for high data rates.
Beling, A., Mekonnen, G.G., Kunkel, R., Schmidt, D.
A periodic parallel-fed traveling-wave photodetector (TWPD) with monolithically integrated power splitter is presented. The device exhibits an impedance match to the 5042 environment as well as a...
Tetzlaff, B., Kunkel, R., Schäfer, W., Wendland, F.
The implementation of the EU Water Framework Directive (EU-WFD) forms the background of the WAgriCo-project (Water Resources Management in Cooperation with Agriculture). WagriCo concentrates on the...
Tetzlaff, B., Kunkel, R., Schäfer, W., Wendland, F.
The implementation of the EU Water Framework Directive (EU-WFD) forms the background of the WAgriCo-project (Water Resources Management in Cooperation with Agriculture). WagriCo concentrates on the...
B. Tetzlaff, R. Kunkel, W. Schäfer, F. Wendland
The implementation of the EU Water Framework Directive (EU-WFD) forms the background of the WAgriCo-project (Water Resources Management in Cooperation with Agriculture). WagriCo concentrates on the...
Thin film substrate technology and FC interconnection for very high frequency applications (2006)
Töpper, M., Rosin, T., Fritzsch, T., Jordan, R., Mekonnen, G., Sakkas, C., ...
High speed interconnections for the next generation internet or high frequency measurement systems need ultra fast photodetectors and appropriate high frequency transmission lines. A highly critical...
Bach, H.G., Beling, A., Ebert, W., Eckhardt, T., Gibis, R., Kunkel, R., ...
Die Weiterentwicklung von wellenleiter-integrierten Photodetektoren für Bitraten von 80/100 Gbit/s und höher und die Steigerung der Bandbreite der Photoempfänger bei 160 Gbit/s unter Anwendung des...
Coupling between PTFE and rubber - A new elastomeric material (2005)
Lehmann, D, Heinrich, G, Linhart, C, Kunze, K, ...
The initial point for the development of chemically coupled PTFE-materials is represented by the chemically coupled PTFE-PA compounds, which exhibit extraordinary wear resistant values and a low...
Uncertainties in the simulation of groundwater recharge at different scales (2005)
H. Bogena, R. Kunkel, C. Montzka, F. Wendland
Digital spatial data always imply some kind of uncertainty. The source of this uncertainty can be found in their compilation as well as the conceptual design that causes a more or less exact...
80-Gb/s InP-based waveguide-integrated photoreceiver (2005)
Mekonnen, G.G., Beling, A., Kunkel, R., Schmidt, D., Schlaak, W.
A waveguide-integrated photoreceiver, comprising a waveguide-integrated photodiode and a distributed amplifier, is presented. Its optical to electrical conversion capability for nonreturn to zero...
Beling, A., Mekonnen, G.G., Kunkel, R., Schmidt, D.
A low-capacitance waveguide-integrated photodiode on InP with a minimized absorber length is presented. In order to maintain a high quantum efficiency, an optical matching layer exploiting mode...
High-bandwidth balanced photoreceiver suitable for 40 Gb/s RZ-DPSK modulation formats (2005)
Schramm, C., Beling, A., Jacumeit, G., Ferber, S., Ludwig, R., ...
A novel fully packaged balanced photoreceiver designed for 40 Gb/s DPSK applications at 1.55 µm wavelength is presented. Based on InP:Fe substrate two waveguide-integrated photodiodes with spot size...
InP-based 1.55 µm high-speed photodetectors for 80 Gbit/s systems and beyond (2005)
Beling, A., Kunkel, R., Mekonnen, G.G., Schmidt, D.
The paper reviews the key characteristics of recent developments in the field of ultra fast photodetectors for 1.55 /spl mu/m wavelength. In detail, we report on a fully packaged highly efficient...
Uncertainties in the simulation of groundwater recharge at different scales (2005)
Bogena, H., Kunkel, R., Montzka, C., Wendland, F.
Digital spatial data always imply some kind of uncertainty. The source of this uncertainty can be found in their compilation as well as the conceptual design that causes a more or less exact...
Uncertainties in the simulation of groundwater recharge at different scales (2005)
Bogena, H., Kunkel, R., Montzka, C., Wendland, F.
Digital spatial data always imply some kind of uncertainty. The source of this uncertainty can be found in their compilation as well as the conceptual design that causes a more or less exact...
Beling, A., Mekonnen, G.G., Schmidt, D., Schlaak, W., Kunkel, R., ...
The fabrication and characterization of InP-based narrowband photodetector OEICs and modules, covering the frequency range 38-90 GHz, is reported. The reverse bias tuneable detectors exhibit 0.55A/W...
Optische Empfänger und Verstärker für integrierte Schaltungen im Höchstfrequenzbereich werden wegen des erreichbaren Leistungsvermögens hinsichtlich maximaler Arbeitsfrequenz und...
Mekonnen, G.G., Beling, A., Schmidt, D., Schlaak, W., Kunkel, R., ...
InP-based narrowband photodetectors designed for 40, 60, 80 and 85 GHz resonance frequencies were fabricated and packaged into modules. Gain values of 7 dB are typically extracted at a bias point of...
InP-based waveguide-integrated photodetector with 100-GHz bandwidth (2004)
Beling, A., Mekonnen, G.G., Kunkel, R., Schmidt, D., Ebert, W., ...
A waveguide-integrated photodetector is presented, exhibiting a bandwidth of 100 GHz. The responsivity amounts to 0.66 A/W and the PDL is below 0.9 dB. The detector chip is designed to obtain a...
Modelling water fluxes for the analysis of diffuse pollution at the river basin scale (2000)
Meinardi, C.R., Wendland, F., Kunkel, R.
Diffuse pollution is a significant and sometimes even major component of surface water pollution. Diffuse inputs of pollutants to the surface water are related to runoff of precipitation. This means...
High-dose aprotinin reduces systemic inflammatory response syndrome during CABG (1999)
Tassani, P, Augustin, N, Kunkel, R, Braun, SL, Richter, JA
No abstract available.
Vorrichtung zur Klimatisierung (1997)
Dietz, B., Kunkel, R., Noeres, P.
DE 19535841 A UPAB: 19970424 The air conditioning unit has a condenser, evaporator and absorber in a circuit with a solar collector as a heater. Between the collector (20) and a desorber (13) is a...
Post-Chernobyl whole-body counting measurements in the Federal Republic of Germany. (1988)
Schmier, H., Koeppe, P., Erlenbach, H., Berg, D., Brod, K.H., Doerfel, H., ...
IRPA-Congress, Sydney, AUS, April 10-17, 1988
Inkorporationsueberwachung durch Direktmessung der Koerperaktivitaet. (1980)
Kunkel, R., Boehne, A., Doerfel, H., Koeppe, P., Rose, E., Schieferdecker, H., ...
FS-80-24-AKI (November 80)
Zador, I Z, Deshmukh, G D, Kunkel, R, Johnson, K, Radin, N S, Shayman, J A
Glucosylceramide (GlcCer) and related glycosphingolipids have been implicated as causal elements in both the growth of cells and in the regulation of hormonal signaling. We therefore studied whether...
Till, G O, Johnson, K J, Kunkel, R, Ward, P A
Intravascular activation of the complement system with cobra venom factor results in acute lung injury, which has been quantitated by increases in lung vascular permeability. Cobra venom factor...
Evidence for role of hydroxyl radical in complement and neutrophil-dependent tissue injury.
Ward, P A, Till, G O, Kunkel, R, Beauchamp, C
Using our recently described model of acute lung injury in rats after systemic activation of complement by cobra venom factor (CVF), we demonstrated that pretreatment of animals with human milk...
Zador, I Z, Deshmukh, G D, Kunkel, R, Johnson, K, Radin, N S, Shayman, J A
Glucosylceramide (GlcCer) and related glycosphingolipids have been implicated as causal elements in both the growth of cells and in the regulation of hormonal signaling. We therefore studied whether...
Till, G O, Johnson, K J, Kunkel, R, Ward, P A
Intravascular activation of the complement system with cobra venom factor results in acute lung injury, which has been quantitated by increases in lung vascular permeability. Cobra venom factor...
Evidence for role of hydroxyl radical in complement and neutrophil-dependent tissue injury.
Ward, P A, Till, G O, Kunkel, R, Beauchamp, C
Using our recently described model of acute lung injury in rats after systemic activation of complement by cobra venom factor (CVF), we demonstrated that pretreatment of animals with human milk...
Brieland, J., Freeman, P., Kunkel, R., Chrisp, C., Hurley, M., Fantone, J., ...
The role of host immune responses in the pathogenesis of Legionnaires' disease is incompletely understood, due in part to the current lack of an animal model that is both susceptible to replicative...
Activation of C5 by cobra venom factor is required in neutrophil-mediated lung injury in the rat.
Till, G. O., Morganroth, M. L., Kunkel, R., Ward, P. A.
Cobra venom factor (CVF)-induced systemic activation of the complement system in the rat has been shown to result in the development of acute lung microvascular injury and appearance in lungs and...
A study of the origin of pulmonary macrophages using the Chédiak-Higashi marker.
Johnson, K. J., Ward, P. A., Striker, G., Kunkel, R.
Using bone marrow reconstitution techniques with cells bearing the Chédiak-Higashi marker, the authors have been able to demonstrate in mice that both interstitial and intraalveolar macrophages of...
Raj, A S, Tuscan, M, Shapiro, B, Glatfelter, A, Kunkel, R, Wiggins, R C
The purpose of this study was to determine the feasibility of displacing cationized bovine serum albumin (CBSA) immune complexes from glomeruli by charge competition. An in vitro model identified...