Mr. Edgar Pawlowski Profile

Edgar Pawlowski

at SCHOTT AG

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 10 October 2012 Paper

CPV semi-dense array design for dish and tower collectors

Herb Hayden, Paul Thomas, Nicholas Fette, Zoltan Farkas, Michael Bading, Bradley Stone, Mark Miner, Oliver Stickroth, Nakul Bagewadi, Memo Romero, Birol Sonuparlak, Rainer Eichholz, Michael Ziegler, Edgar Pawlowski

Proceedings Volume 8468, 84680I (2012) https://doi.org/10.1117/12.930054

KEYWORDS: Concentrated solar cells, Mirrors, Sun, Glasses, Optics manufacturing, Liquids, Optical arrays, Photovoltaics, Prototyping, Solar cells

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Proceedings Article | 17 February 2010 Paper

Yb:YAG composite ceramic laser

Edgar Pawlowski, Michael Kluge, Yvonne Menke, Ulrich Peuchert, Axel Engel, Yan Lin Aung, Akio Ikesue, Kolja Beil, Rigo Peters, Henning Kuehn, Klaus Petermann, Peter Heist

Proceedings Volume 7578, 757815 (2010) https://doi.org/10.1117/12.842071

KEYWORDS: Ceramics, Laser applications, Crystals, Composites, Absorption, Ytterbium, Luminescence, Disk lasers, Laser crystals, Output couplers

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Proceedings Article | 13 February 2008 Paper

Diffractive optical elements fabricated for beam shaping of high-power diode lasers

Helge Vogt, Ralf Biertümpfel, Edgar Pawlowski

Proceedings Volume 6876, 687617 (2008) https://doi.org/10.1117/12.763734

KEYWORDS: Diffractive optical elements, Glasses, Diffraction, Precision glass molding, Beam shaping, Semiconductor lasers, High power lasers, Computer generated holography, Optical components, Diffraction gratings

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Proceedings Article | 7 March 2007 Paper

Diffractive optical elements fabricated by precise pressing of glass

Helge Vogt, Bernd Woelfing, Edgar Pawlowski

Proceedings Volume 6462, 64621E (2007) https://doi.org/10.1117/12.717952

KEYWORDS: Glasses, Diffractive optical elements, Diffraction, Optical components, Diffraction gratings, Precision glass molding, Polymers, Computer generated holography, Silver, Optical design

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Proceedings Article | 13 February 2007 Paper

Reference-based optical characterization of glass-ceramic converter for high-power white LEDs

A. Engel, M. Letz, T. Zachau, E. Pawlowski, K. Seneschal-Merz, T. Korb, D. Enseling, B. Hoppe, U. Peuchert, J. Hayden

Proceedings Volume 6486, 64860Y (2007) https://doi.org/10.1117/12.705334

KEYWORDS: Glasses, Scattering, Ceramics, Luminescence, Crystals, Light scattering, YAG lasers, Cerium, Light emitting diodes, Absorption

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Fluorescence techniques are known for their high sensitivity and are widely used as analytical tools and detection methods for product and process control, material sciences, environmental and bio-technical analysis, molecular genetics, cell biology, medical diagnostics and drug screening. According to DIN/ISO 17025 certified standards are used for fluorescence diagnostics having the drawback of giving relative values for fluorescence intensities only. Therefore reference materials for a quantitative characterization have to be related directly to the materials under investigation. In order to evaluate these figures it is necessary to calculate absolute numbers like absorption/excitation cross section and quantum yield. This can be done for different types of dopants in different materials like glass, glass ceramics, crystals or nano crystalline material embedded in polymer matrices. Here we consider a special type of glass ceramic with Ce doped YAG as the main crystalline phase. This material has been developed for the generation of white light realized by a blue 460 nm semiconductor transition using a yellow phosphor or converter material respectively. Our glass ceramic is a pure solid state solution for a yellow phosphor. For the production of such a kind of material a well controlled thermal treatment is employed to transfer the original glass into a glass ceramic with a specific crystalline phase. In our material Ce doped YAG crystallites of a size of several µm are embedded in a matrix of a residual glass. We present chemical, structural and spectroscopic properties of our material. Based on this we will discuss design options for white LED's with respect to heat management, scattering regime, reflection losses, chemical durability and stability against blue and UV radiation, which evolve from our recently developed material. In this paper we present first results on our approaches to evaluate quantum yield and light output. Used diagnostics are fluorescence (steady state, decay time) and absorption (remission, absorption) spectroscopy working in different temperature regimes (10 - 350 K) of the measured samples in order to get a microscopic view of the relevant physical processes and to prove the correctness of the obtained data.

Proceedings Article | 17 June 2003 Paper

New heavy metal oxide silicate amplifier glass for compact and broadband amplifiers

F. Bullesfeld, Bernd Drapp, V. Hagemann, Martin Letz, Ulrich Peuchert, S. Reichel, Ruediger Sprengard, Tobias Kaelber, Matthias Brinkmann, B. Schreder, E. Pawlowski, S. Pucilowski, Joseph Hayden

Proceedings Volume 4990, (2003) https://doi.org/10.1117/12.479379

KEYWORDS: Glasses, Oxides, Metals, Silicate glass, Optical amplifiers, Erbium, Absorption, Planar waveguides, Fiber amplifiers, Silica

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Proceedings Article | 27 August 1999 Paper

Multifocus optical pickup with diffractive optical elements

Edgar Pawlowski

Proceedings Volume 3737, (1999) https://doi.org/10.1117/12.360040

KEYWORDS: Diffractive optical elements, Diffraction, Photomasks, Optical components, Diffraction gratings, Refractive index, Optical alignment, Etching, Ion beams, Sensors

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Proceedings Article | 27 August 1999 Paper

Arrayed-waveguide grating demultiplexer with variable transmission characteristic

Edgar Pawlowski, Berndt Kuhlow, Georges Przyrembel, Christian Warmuth

Proceedings Volume 3737, (1999) https://doi.org/10.1117/12.360050

KEYWORDS: Waveguides, Demultiplexers, Wavelength division multiplexing, Interferometers, Reactive ion etching, Coherence (optics), Light emitting diodes, Thin films, Phase measurement, Optical lithography

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Proceedings Article | 19 July 1999 Paper

Integrated optical pickup for optical disks

Theo Tschudi, Lingli Wang, Svetomir Stankovic, Mathias Hain, Shanti Bhattacharia, Daniel Diaz, Lhoucine Benmohammadi, Chialou Karaboue, Edgar Pawlowski, Margit Ferstl

Proceedings Volume 3749, (1999) https://doi.org/10.1117/12.354811

KEYWORDS: Integrated optics, Optical discs, Liquid crystals, Digital video discs, Diffractive optical elements, Packaging, Lenses, Applied physics, Compact discs, Optical storage

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Proceedings Article | 27 July 1995 Paper

Diffractive optical elements: fabrication and measurement of a wavelength division demultiplexer

Edgar Pawlowski

Proceedings Volume 2577, (1995) https://doi.org/10.1117/12.215311

KEYWORDS: Diffractive optical elements, Diffraction, Demultiplexers, Silicon, Photomasks, Fabrication, Transmittance, Optical components, Optical testing, Optical aberrations

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SPIE Journal Paper | 1 November 1994

Antireflection-coated diffractive optical elements fabricated by thin-film deposition

Edgar Pawlowski, Berndt Kuhlow

OE, Vol. 33, Issue 11, (November 1994) https://doi.org/10.1117/12.10.1117/12.179893

KEYWORDS: Lenses, Diffraction, Silicon, Antireflective coatings, Glasses, Refractive index, Diffractive optical elements, Quartz, Photomasks, Reflection

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Proceedings Article | 30 September 1994 Paper

Multilevel Fresnel zone lenses capable of being fabricated with only one binary mask

Berndt Kuhlow, Margit Ferstl, Edgar Pawlowski, Georges Przyrembel, Peter Galloway

Proceedings Volume 2263, (1994) https://doi.org/10.1117/12.187991

KEYWORDS: Lenses, Photomasks, Diffraction, Binary data, Gaussian beams, Etching, Lithography, Image processing, Thin film deposition, Overlay metrology

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Proceedings Article | 28 July 1994 Paper

Integrated planar Fresnel zone lenses for beam forming and coupling

Edgar Pawlowski

Proceedings Volume 2213, (1994) https://doi.org/10.1117/12.180950

KEYWORDS: Waveguides, Lenses, Refractive index, Microlens, Photomasks, Diffraction, Oxygen, Silicon, Free space, Tolerancing

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SPIE Journal Paper | 1 April 1994

Effect of fabrication errors on multilevel Fresnel zone lenses

Margit Ferstl, Berndt Kuhlow, Edgar Pawlowski

OE, Vol. 33, Issue 04, (April 1994) https://doi.org/10.1117/12.10.1117/12.163122

KEYWORDS: Lenses, Etching, Diffraction, Photomasks, Optical alignment, Chromium, Phase shifts, Glasses, Binary data, Photoresist materials

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SPIE Journal Paper | 1 February 1994

Diffractive microlenses with antireflection coatings fabricated by thin film deposition

Edgar Pawlowski, Herbert Engel, Margit Ferstl, Walther Fuerst, Berndt Kuhlow

OE, Vol. 33, Issue 02, (February 1994) https://doi.org/10.1117/12.10.1117/12.153180

KEYWORDS: Lenses, Antireflective coatings, Reflection, Microlens, Silicon, Refractive index, Diffraction, Thin film deposition, Reflectivity, Computer generated holography

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Proceedings Article | 15 December 1993 Paper

Antireflection-coated arrays of binary lenses for interconnection networks at 1.5 um

Margit Ferstl, Berndt Kuhlow, Edgar Pawlowski

Proceedings Volume 1992, (1993) https://doi.org/10.1117/12.165678

KEYWORDS: Lenses, Diffraction, Etching, Photomasks, Quartz, Glasses, Reactive ion etching, Micro optics, Optical interconnects, Optical alignment

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Proceedings Article | 17 September 1993 Paper

Computer-generated microlenses with high efficiency

Edgar Pawlowski, Margit Ferstl, Berndt Kuhlow

Proceedings Volume 1914, (1993) https://doi.org/10.1117/12.155013

KEYWORDS: Lenses, Diffraction, Photomasks, Refractive index, Microlens, Silicon, Reflection, Optical alignment, Coating, Reflectivity

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Proceedings Article | 2 March 1993 Paper

Blazed Fresnel zone lenses approximated by discrete step profiles: effects of fabrication errors

Margit Ferstl, Berndt Kuhlow, Edgar Pawlowski

Proceedings Volume 1732, (1993) https://doi.org/10.1117/12.140386

KEYWORDS: Lenses, Etching, Diffraction, Holography, Photomasks, Zone plates, Optical alignment, Phase shifts, Quartz, Glasses

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Proceedings Article | 13 January 1993 Paper

Holographic elements for optical interconnects at 1.5 um

Berndt Kuhlow, Margit Ferstl, Harald Kobolla, Edgar Pawlowski

Proceedings Volume 1751, (1993) https://doi.org/10.1117/12.138906

KEYWORDS: Diffraction, Zone plates, Lenses, Holograms, Holography, Switching, Etching, Optical components, Optical interconnects, Diffraction gratings

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Proceedings Article | 13 January 1993 Paper

Two-dimensional array of AR-coated diffractive microlenses fabricated by thin-film deposition

Edgar Pawlowski, Herbert Engel, Margit Ferstl, Walther Fuerst, Berndt Kuhlow

Proceedings Volume 1751, (1993) https://doi.org/10.1117/12.138880

KEYWORDS: Lenses, Diffraction, Reflection, Microlens, Refractive index, Micro optics, Photomasks, Thin film deposition, Antireflective coatings, Optical alignment

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