Dr. Christoph A. Wächter Profile

Dr. Christoph A. Wächter

at Fraunhofer-IOF

SPIE Involvement:

Conference Program Committee | Conference Co-Chair | Conference Chair | Author

Publications (39)

PROCEEDINGS ARTICLE | June 15, 2018

Evaluation of lenslet fabrication technologies for micro-optical array projectors

Proc. SPIE. 10692, Optical Fabrication, Testing, and Metrology VI

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

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PROCEEDINGS ARTICLE | May 28, 2018

Etendue conserving light shaping using microlens arrays with irregular lenslets

Proc. SPIE. 10693, Illumination Optics V

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

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PROCEEDINGS ARTICLE | March 1, 2016

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

Proc. SPIE. 9750, Integrated Optics: Devices, Materials, and Technologies XX

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

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PROCEEDINGS ARTICLE | September 27, 2013

OLED emission zone measurement with high accuracy

Proc. SPIE. 8829, Organic Light Emitting Materials and Devices XVII

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

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PROCEEDINGS ARTICLE | September 27, 2013

Optical design including characteristics of manufactured nanostructures

Proc. SPIE. 8840, Optical Modeling and Performance Predictions VI

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

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PROCEEDINGS ARTICLE | October 15, 2012

Monolithic optical components for splitting of high-power beams

Proc. SPIE. 8490, Laser Beam Shaping XIII

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

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PROCEEDINGS ARTICLE | September 13, 2011

Effects of metallic nanoparticle arrays in Si solar cell structures

Proc. SPIE. 8110, Thin Film Solar Technology III

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

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SPIE Conference Volume | January 31, 2011

Integrated Optics: Devices, Materials, and Technologies XV

PROCEEDINGS ARTICLE | May 13, 2010

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

Proc. SPIE. 7716, Micro-Optics 2010

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

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SPIE Conference Volume | February 12, 2010

Integrated Optics: Devices, Materials, and Technologies XIV

PROCEEDINGS ARTICLE | February 12, 2010

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

Proc. SPIE. 7617, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV

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

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SPIE Conference Volume | February 6, 2009

Integrated Optics: Devices, Materials, and Technologies XIII

SPIE Conference Volume | March 6, 2008

Integrated Optics: Devices, Materials, and Technologies XII

PROCEEDINGS ARTICLE | February 13, 2008

Intrinsic OLED emitter properties and their effect on device performance

Proc. SPIE. 6910, Light-Emitting Diodes: Research, Manufacturing, and Applications XII

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

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PROCEEDINGS ARTICLE | October 30, 2007

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

Proc. SPIE. 6796, Photonics North 2007

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

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PROCEEDINGS ARTICLE | March 7, 2007

Light extraction from OLEDs: the waveguide perspective

Proc. SPIE. 6475, Integrated Optics: Devices, Materials, and Technologies XI

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

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SPIE Conference Volume | February 6, 2007

Integrated Optics: Devices, Materials, and Technologies XI

SPIE Conference Volume | February 15, 2006

Integrated Optics: Devices, Materials, and Technologies X

PROCEEDINGS ARTICLE | March 31, 2005

Fiber-chip coupling with silicon microlenses

Proc. SPIE. 5728, Integrated Optics: Devices, Materials, and Technologies IX

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

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SPIE Conference Volume | March 31, 2005

Integrated Optics: Devices, Materials, and Technologies IX

PROCEEDINGS ARTICLE | November 16, 2004

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

Proc. SPIE. 5579, Photonics North 2004: Photonic Applications in Telecommunications, Sensors, Software, and Lasers

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

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PROCEEDINGS ARTICLE | August 18, 2004

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

Proc. SPIE. 5451, Integrated Optics and Photonic Integrated Circuits

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

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PROCEEDINGS ARTICLE | November 19, 2003

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

Proc. SPIE. 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life

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

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PROCEEDINGS ARTICLE | November 19, 2003

Optical signal summation with multiplayer integrated optical fan-out devices

Proc. SPIE. 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life

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

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PROCEEDINGS ARTICLE | July 14, 2003

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

Proc. SPIE. 4991, Organic Photonic Materials and Devices V

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

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PROCEEDINGS ARTICLE | June 19, 2003

Coupling coefficients for photonic crystal waveguides

Proc. SPIE. 4987, Integrated Optics: Devices, Materials, and Technologies VII

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

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PROCEEDINGS ARTICLE | November 6, 2001

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

Proc. SPIE. 4439, Design, Manufacturing, and Testing of Planar Optical Waveguide Devices

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

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PROCEEDINGS ARTICLE | November 6, 2001

Multilayer optical fan-out device composed of stacked monomode waveguides

Proc. SPIE. 4453, Materials and Devices for Photonic Circuits II

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

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PROCEEDINGS ARTICLE | May 15, 2001

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

Proc. SPIE. 4277, Integrated Optics Devices V

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

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PROCEEDINGS ARTICLE | March 24, 2000

Active and passive components of 3D integrated optics

Proc. SPIE. 3936, Integrated Optics Devices IV

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

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PROCEEDINGS ARTICLE | March 26, 1999

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

Proc. SPIE. 3620, Integrated Optics Devices III

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

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PROCEEDINGS ARTICLE | January 12, 1998

Integrated optics toward the third dimension

Proc. SPIE. 3278, Integrated Optic Devices II

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

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PROCEEDINGS ARTICLE | January 23, 1997

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

Proc. SPIE. 2997, Integrated Optics Devices: Potential for Commercialization

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

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PROCEEDINGS ARTICLE | January 23, 1997

Applications of standard BPM algorithms

Proc. SPIE. 2997, Integrated Optics Devices: Potential for Commercialization

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

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PROCEEDINGS ARTICLE | December 20, 1996

Waveguide element for highly effective dispersion compensation in fiber transmission lines

Proc. SPIE. 2954, Fiber Integrated Optics

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

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PROCEEDINGS ARTICLE | December 20, 1996

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

Proc. SPIE. 2954, Fiber Integrated Optics

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

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PROCEEDINGS ARTICLE | August 25, 1994

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

Proc. SPIE. 2212, Linear and Nonlinear Integrated Optics

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

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PROCEEDINGS ARTICLE | May 2, 1994

Design and fabrication of rib ARROW couplers

Proc. SPIE. 2150, Design, Simulation, and Fabrication of Optoelectronic Devices and Circuits

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

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PROCEEDINGS ARTICLE | December 16, 1993

Electro-optic effects in polymer waveguide devices for optical communication

Proc. SPIE. 2025, Nonlinear Optical Properties of Organic Materials VI

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

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