Dr. Christoph A. Wächter Profile

Dr. Christoph A. Wächter

at Fraunhofer-IOF

SPIE Involvement:

Author

Publications (34)

Proceedings Article | 15 March 2021 Open Access

Laser-based manipulation and readout for multi-ion traps in quantum computing (Conference Presentation)

E. Beckert, Christoph Waechter, Bernd Hoefer, Uwe Zeitner

Proceedings Volume 11699, 116990I (2021) https://doi.org/10.1117/12.2574608

KEYWORDS: Ions, Quantum computing, Prisms, Quantum communications, Computer architecture, Beam steering, Telescopes, Objectives, Micro optics, Mirrors

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 6 April 2020 Presentation

Etendue conserving light shaping using irregular fly's eye condensers (Conference Presentation)

Peter Schreiber, Christoph Wächter, Dirk Michaelis, Marko Stumpf, Stephanie Fischer, Peter Dannberg, Robert Leitel

Proceedings Volume 11351, 113512C (2020) https://doi.org/10.1117/12.2567106

Read Abstract +

Proceedings Article | 15 June 2018 Paper

Evaluation of lenslet fabrication technologies for micro-optical array projectors

Robert Leitel, Stephanie Fischer, Peter Dannberg, Sylke Kleinle, Peter Schreiber, Christoph Wächter

Proceedings Volume 10692, 1069206 (2018) https://doi.org/10.1117/12.2313971

KEYWORDS: Projection systems, Grayscale lithography, Microlens array, Stars, Microlens, Photoresist materials, Collimation, Lenses, Photomasks, Calibration

Read Abstract +

Proceedings Article | 28 May 2018 Paper

Etendue conserving light shaping using microlens arrays with irregular lenslets

Chen Li, Peter Schreiber, Dirk Michaelis, Christoph Wächter, Stephanie Fischer, Uwe Zeitner

Proceedings Volume 10693, 1069304 (2018) https://doi.org/10.1117/12.2313803

KEYWORDS: Beam shaping, Lens design, Microlens array, Grayscale lithography, Diffusers, Beam homogenizers

Read Abstract +

Proceedings Article | 1 March 2016 Paper

Leaky waveguides for low k-measurement: From structure design to loss evaluation

Christoph Wächter, Riccardo Rizzo, Francesco Michelotti, Peter Munzert, Norbert Danz

Proceedings Volume 9750, 975019 (2016) https://doi.org/10.1117/12.2208133

KEYWORDS: Titanium dioxide, Waveguides, Optical coatings, Spectrophotometry, Thin films, Refractive index, Inverse problems, Reflectivity, Silica, Resonators, Laser Doppler velocimetry

Read Abstract +

Proceedings Article | 27 September 2013 Paper

Optical design including characteristics of manufactured nanostructures

Christoph Wächter, Martin Müller, Erik Förster, Maria Oliva, Dirk Michaelis

Proceedings Volume 8840, 88400B (2013) https://doi.org/10.1117/12.2024055

KEYWORDS: Nanostructures, Optical design, Metamaterials, Near field optics, Optics manufacturing, Transmittance, Polarizers, Optical components, Data modeling, Nanostructuring

Read Abstract +

Proceedings Article | 27 September 2013 Paper

OLED emission zone measurement with high accuracy

N. Danz, R. MacCiarnain, D. Michaelis, T. Wehlus, A. Rausch, C. Wächter, T. C. Reusch

Proceedings Volume 8829, 882923 (2013) https://doi.org/10.1117/12.2023936

KEYWORDS: Organic light emitting diodes, Spatial resolution, Electromagnetic theory, OLED lighting, Glasses, Superposition, Internal quantum efficiency, Reverse modeling, Mathematical modeling, Mathematics

Read Abstract +

Proceedings Article | 15 October 2012 Paper

Monolithic optical components for splitting of high-power beams

M. Jarczynski, T. Mitra, M. Ivaneko, L. Aschke, C. Wächter, U. Fuchs, T. Linke, S. Kiontke

Proceedings Volume 8490, 84900Q (2012) https://doi.org/10.1117/12.932256

KEYWORDS: Beam splitters, High power lasers, Aspheric lenses, Optics manufacturing, Silica, Diffraction, Optical components, Optical design, Glasses, Diffractive optical elements

Read Abstract +

Proceedings Article | 13 September 2011 Paper

Effects of metallic nanoparticle arrays in Si solar cell structures

Tino Benkenstein, Michael Flämmich, Torsten Harzendorf, Thomas Käsebier, Dirk Michaelis, Maria Oliva, Christoph Wächter, Uwe Zeitner

Proceedings Volume 8110, 81100D (2011) https://doi.org/10.1117/12.894385

KEYWORDS: Absorption, Particles, Silicon, Nanoparticles, Solar cells, Scattering, Silver, Plasmonics, Atomic force microscopy, Interfaces

Read Abstract +

Proceedings Article | 13 May 2010 Paper

Micro-optical beam-shaper for tailoring light emission from OLEDs

Michael Flämmich, Dirk Michaelis, Norbert Danz, Christoph Wächter, Peter Dannberg, Andreas Bräuer

Proceedings Volume 7716, 771616 (2010) https://doi.org/10.1117/12.853871

KEYWORDS: Organic light emitting diodes, Stray light, OLED lighting, Reflectivity, Photography, Light sources, Prisms, Micro optics, Light, Optical components

Read Abstract +

Proceedings Article | 12 February 2010 Paper

Measuring the internal luminescence quantum efficiency of OLED emitter materials in electrical operation

Michael Flämmich, Norbert Danz, Dirk Michaelis, Christoph Wächter, Andreas Bräuer, Malte Gather, Klaus Meerholz

Proceedings Volume 7617, 761715 (2010) https://doi.org/10.1117/12.842114

KEYWORDS: Organic light emitting diodes, Luminescence, Quantum efficiency, Refractive index, Internal quantum efficiency, Optical properties, Polymers, Optical simulations, External quantum efficiency, Interfaces

Read Abstract +

Proceedings Article | 13 February 2008 Paper

Intrinsic OLED emitter properties and their effect on device performance

Christoph Wächter, Norbert Danz, Dirk Michaelis, Michael Flämmich, Sergey Kudaev, Andreas Bräuer, Malte Gather, Klaus Meerholz

Proceedings Volume 6910, 691006 (2008) https://doi.org/10.1117/12.769123

KEYWORDS: Organic light emitting diodes, Refractive index, RGB color model, Polymers, Light emitting diodes, Data modeling, Ions, Interfaces, Optical properties, Lamps

Read Abstract +

Proceedings Article | 30 October 2007 Paper

OLED design: combined micro-and nanophotonics modeling, and routes to a complex optimization algorithm

Norbert Danz, Dirk Michaelis, Christoph Wächter

Proceedings Volume 6796, 67963F (2007) https://doi.org/10.1117/12.779058

KEYWORDS: Organic light emitting diodes, Aluminum, Silver, Interfaces, Dielectrics, Quantum efficiency, Reflectivity, Prisms, Refractive index, Metals

Read Abstract +

Proceedings Article | 7 March 2007 Paper

Light extraction from OLEDs: the waveguide perspective

Norbert Danz, Dirk Michaelis, Christoph Wächter

Proceedings Volume 6475, 64750J (2007) https://doi.org/10.1117/12.700569

KEYWORDS: Organic light emitting diodes, Polymers, Waveguides, Refractive index, Interfaces, Excitons, Photons, Electrodes, Absorption, Glasses

Read Abstract +

Proceedings Article | 31 March 2005 Paper

Fiber-chip coupling with silicon microlenses

Christoph Waechter, Tino Benkenstein, Bernd Hoefer, Andre Matthes, Dirk Michaelis

Proceedings Volume 5728, (2005) https://doi.org/10.1117/12.590812

KEYWORDS: Waveguides, Silicon, Fiber couplers, Photonic crystals, Polymers, Optical fiber cables, Finite-difference time-domain method, Etching, Geometrical optics, Interfaces

Read Abstract +

Proceedings Article | 16 November 2004 Paper

Analysis of fiber-chip coupling for general high-index contrast waveguides

Christoph Waechter, Dirk Michaelis

Proceedings Volume 5579, (2004) https://doi.org/10.1117/12.566360

KEYWORDS: Waveguides, Interfaces, Fiber couplers, Photonic crystals, Silicon, Wave propagation, Information operations, Modeling, Finite-difference time-domain method, Integrated optics

Read Abstract +

Proceedings Article | 18 August 2004 Paper

Design tools and modeling techniques for integrated optics devices: requirements and applications

Christoph Waechter

Proceedings Volume 5451, (2004) https://doi.org/10.1117/12.548979

KEYWORDS: Waveguides, Refractive index, Wave propagation, Information operations, Beam propagation method, Integrated optics, Instrument modeling, Interfaces, Computer aided design, Optical design

Read Abstract +

Proceedings Article | 19 November 2003 Paper

Optical signal summation with multiplayer integrated optical fan-out devices

Ulrich Streppel, Peter Dannberg, Christoph Waechter, Andreas Braeuer, Pierre Nicole

Proceedings Volume 4829, (2003) https://doi.org/10.1117/12.525261

KEYWORDS: Waveguides, Integrated optics, Phased array optics, Polymers, Ultraviolet radiation, Absorption, Scattering, Optical fabrication, Standards development, Antennas

Read Abstract +

Proceedings Article | 19 November 2003 Paper

Control of self-writing processes in photopolymerizable resins for the fabrication of micro-optical structures

Ulrich Streppel, Peter Dannberg, Christoph Waechter, Andreas Braeuer

Proceedings Volume 4829, (2003) https://doi.org/10.1117/12.530786

KEYWORDS: Refractive index, Process control, Polymers, Beam propagation method, Photomasks, Lithography, Control systems, Chemical reactions, Ultraviolet radiation, Beam shaping

Read Abstract +

Proceedings Article | 14 July 2003 Paper

Influence and utilization of UV-induced refractive index changes of photopolymers for the fabrication of 3D micro-optical elements

Ulrich Streppel, Peter Dannberg, Christoph Waechter, Dirk Michaelis, Richard Kowarschik, Andreas Braeuer

Proceedings Volume 4991, (2003) https://doi.org/10.1117/12.475429

KEYWORDS: Polymers, Refractive index, Lithography, Photomasks, Beam propagation method, Ultraviolet radiation, Optical lithography, Algorithm development, Polymerization, Computer simulations

Read Abstract +

Proceedings Article | 19 June 2003 Paper

Coupling coefficients for photonic crystal waveguides

Dirk Michaelis, Ulf Peschel, Christoph Waechter, Andreas Braeuer

Proceedings Volume 4987, (2003) https://doi.org/10.1117/12.478331

KEYWORDS: Waveguides, Photonic crystals, Wave propagation, Dispersion, Polaritons, Integrated optics, Magnetism, Finite-difference time-domain method, Berkelium, Dielectrics

Read Abstract +

Proceedings Article | 6 November 2001 Paper

Multilayer optical fan-out device composed of stacked monomode waveguides

Ulrich Streppel, Peter Dannberg, Christoph Waechter, Andreas Braeuer, Pierre Nicole, Lothar Froehlich, R. Houbertz, Michael Popall

Proceedings Volume 4453, (2001) https://doi.org/10.1117/12.447635

KEYWORDS: Waveguides, Polymers, Ultraviolet radiation, Integrated optics, Near infrared, Cladding, Scattering, Optical components, Standards development, Refractive index

Read Abstract +

Proceedings Article | 6 November 2001 Paper

Realization of a vertical integration scheme for polymer waveguides by a novel stacking technology

Ulrich Streppel, Peter Dannberg, Christoph Waechter, Andreas Braeuer

Proceedings Volume 4439, (2001) https://doi.org/10.1117/12.447622

KEYWORDS: Waveguides, Polymers, Ultraviolet radiation, Cladding, Polymer multimode waveguides, Polymerization, Integrated optics, Refractive index, Standards development, Directional couplers

Read Abstract +

Proceedings Article | 15 May 2001 Paper

Advances in the development of simulation tools for integrated optics devices: FDTD, BPM, and mode-solving techniques

Stoyan Tanev, Dazeng Feng, Steven Dods, Velko Tzolov, Z. Jan Jakubczyk, Chengkun Chen, Pierre Berini, Christoph Waechter, Helder Pinheiro, Andres Barbero, Hugo Hernandez-Figueroa

Proceedings Volume 4277, (2001) https://doi.org/10.1117/12.426784

KEYWORDS: Waveguides, Finite-difference time-domain method, Refractive index, Photonic crystals, Beam propagation method, Mirrors, Wave propagation, Dispersion, Interfaces, Integrated optics

Read Abstract +

Proceedings Article | 24 March 2000 Paper

Active and passive components of 3D integrated optics

Christoph Waechter, Th. Bauer, Matthias Cumme, Peter Dannberg, Wilhelm Elflein, Thomas Henning, Ulrich Streppel, Wolfgang Karthe

Proceedings Volume 3936, (2000) https://doi.org/10.1117/12.379943

KEYWORDS: Waveguides, Directional couplers, Polymers, Integrated optics, Switching, Polymer multimode waveguides, Wave propagation, Tolerancing, Refractive index, Signal attenuation

Read Abstract +

Proceedings Article | 26 March 1999 Paper

Cross talk reduction in switching networks by asymmetrical off-on switches

Winfried Bernhard, Roland Mueller-Fiedler, Thomas Pertsch, Christoph Waechter

Proceedings Volume 3620, (1999) https://doi.org/10.1117/12.343744

KEYWORDS: Waveguides, Switches, Electrodes, Switching, Diffraction, Polymers, Refractive index, Signal attenuation, Cladding, Polymer multimode waveguides

Read Abstract +

Proceedings Article | 12 January 1998 Paper

Integrated optics toward the third dimension

Christoph Waechter, Th. Hennig, Th. Bauer, Andreas Braeuer, Wolfgang Karthe

Proceedings Volume 3278, (1998) https://doi.org/10.1117/12.298189

KEYWORDS: Waveguides, Integrated optics, Polymers, Directional couplers, Tolerancing, Semiconducting wafers, Standards development, Ultraviolet radiation, Planar waveguides, Lithium

Read Abstract +

Proceedings Article | 23 January 1997 Paper

Optimized design and fabrication of integrated optic 1x32 and 2x32 multifunnel power splitters in polymer

Winfried Bernhard, Christoph Waechter, Lars Friedrich, Andreas Braeuer, Wolfgang Karthe

Proceedings Volume 2997, (1997) https://doi.org/10.1117/12.264136

KEYWORDS: Waveguides, Beam propagation method, Receivers, Integrated optics, Polymers, Polymethylmethacrylate, Ultraviolet radiation, Wave propagation, Polymer multimode waveguides, Telecommunications

Read Abstract +

Proceedings Article | 23 January 1997 Paper

Applications of standard BPM algorithms

Christoph Waechter, Martin Palme, Peter Schreiber

Proceedings Volume 2997, (1997) https://doi.org/10.1117/12.264152

KEYWORDS: Beam propagation method, Diffraction gratings, Diffraction, Refractive index, Interfaces, Micro optics, Integrated optics, Ion exchange, Modeling, Ray tracing

Read Abstract +

Proceedings Article | 20 December 1996 Paper

4-by-4 directional coupler device using a three-dimensional waveguide structure

Lars Friedrich, Peter Dannberg, Christoph Waechter, Th. Hennig, Andreas Braeuer, Wolfgang Karthe

Proceedings Volume 2954, (1996) https://doi.org/10.1117/12.262445

KEYWORDS: Waveguides, Directional couplers, Refractive index, Polymethylmethacrylate, Optical lithography, Signal attenuation, Polymers, Cladding, Near field, Diffusion

Read Abstract +

Proceedings Article | 20 December 1996 Paper

Waveguide element for highly effective dispersion compensation in fiber transmission lines

Ulf Peschel, Thomas Peschel, Lutz Leine, Falk Lederer, Christoph Waechter

Proceedings Volume 2954, (1996) https://doi.org/10.1117/12.262444

KEYWORDS: Dispersion, Waveguides, Picosecond phenomena, Optical fibers, Fiber optic communications, Fiber amplifiers, Optical amplifiers, Wave propagation, Solids, Optical components

Read Abstract +

Proceedings Article | 25 August 1994 Paper

Remote coupling in a rib anti-resonant-reflecting-waveguide coupler

B. Holtz, W. Biehlig, Christoph Waechter, Falk Lederer, Lutz Leine

Proceedings Volume 2212, (1994) https://doi.org/10.1117/12.185147

KEYWORDS: Beam propagation method, Finite element methods, Waveguides, Directional couplers, Gaussian beams, Refractive index, Polarization, Dispersion, Modeling, Chemical elements

Read Abstract +

Proceedings Article | 2 May 1994 Paper

Design and fabrication of rib ARROW couplers

Christoph Waechter, W. Biehlig, Andreas Braeuer, J. Gehler, B. Holtz, Wolfgang Karthe, Falk Lederer, Lutz Leine

Proceedings Volume 2150, (1994) https://doi.org/10.1117/12.174992

KEYWORDS: Finite element methods, Waveguides, Refractive index, Wave propagation, Reflectors, Polarization, Error analysis, Dispersion, Numerical analysis, Fabry–Perot interferometers

Read Abstract +

Proceedings Article | 16 December 1993 Paper

Electro-optic effects in polymer waveguide devices for optical communication

Andreas Braeuer, Lars Erdmann, Torsten Gase, Peter Dannberg, Wolfgang Karthe, Christoph Waechter

Proceedings Volume 2025, (1993) https://doi.org/10.1117/12.165294

KEYWORDS: Waveguides, Electro optic polymers, Polymers, Electro optics, Polymer multimode waveguides, Electrodes, Finite element methods, Optical communications, Electro optical design, Interferometers

Read Abstract +