Dr. Thomas Flügel-Paul Profile

Dr. Thomas Flügel-Paul

at Fraunhofer-IOF

SPIE Involvement:

Author

Publications (15)

Proceedings Article | 12 July 2023 Open Access

Open Access

Paper

Manufacturing of a highly efficient gold coated echelle grating for NIR on a thick silicon substrate with small straylight and wavefront error

Susann Sadlowski, Thomas Flügel-Paul, François Wildi, Martin Wittig, Tino Benkenstein, Jan Nathanael, Marcus Trost, Peter Munzert, Michael Scheler, Uwe Zeitner

Proceedings Volume 12777, 127773T (2023) https://doi.org/10.1117/12.2690566

KEYWORDS: Echelle gratings, Optical gratings, Silicon, Manufacturing, Diffraction gratings, Diffraction, Crystals, Blazed gratings, Astronomical imaging, Gold

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Proceedings Article | 29 August 2022 Paper

Paper

CUBES: prototyping the high efficiency UV transmission grating

Uwe D. Zeitner, Thomas Flüegel-Paul, Jan Nathanael, Kristin Gerold, Marcus Trost

Proceedings Volume 12188, 121884Y (2022) https://doi.org/10.1117/12.2628258

KEYWORDS: Diffraction gratings, Diffraction, Polarization, Ultraviolet radiation, Lithography, Electron beam lithography, Scanning electron microscopy, Prototyping, Optical design, Atomic layer deposition

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

CGH for ESO’s ELT M2 reference plate: fabrication of high precision CGHs

Frank Burmeister, Sascha Ehrhardt, Tino Benkenstein, Tom Lammers, Antonia Klein, Philipp Schleicher, Thomas Flügel-Paul, Uwe Zeitner, Philémon Giraud, Houssine Makhlouf, Renaud Mercier-Ythier, Romain Cluzel, Emmanuelle Harel

Proceedings Volume 11451, 114510W (2020) https://doi.org/10.1117/12.2562827

KEYWORDS: Optics manufacturing, Nondestructive evaluation, Etching, Freeform optics, Telescopes, Computer generated holography, Interferometry, Optical fabrication, Electron beam lithography, Optical components

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Progress on the UV-VIS arm of SOXS

Adam Rubin, Sagi Ben-Ami, Ofir Hershko, Michael Rappaport, Avishay Gal-Yam, Rachel Bruch, Sergio Campana, Riccardo Claudi, Pietro Schipani, Matteo Aliverti, Andrea Baruffolo, Federico Biondi, Giulio Capasso, Rosario Cosentino, Francesco D'Alessio, Paolo D'Avanzo, Hanindyo Kuncarayakti, Marco Landoni, Matteo Munari, Giuliano Pignata, Salvatore Scuderi, Fabrizio Vitali, David Young, Jani Achrén, José Antonio Araiza-Duran, Iair Arcavi, Anna Brucalassi, Enrico Cappellaro, Mirko Colapietro, Massimo Della Valle, Marco De Pascale, Rosario Di Benedetto, Sergio D'Orsi, Thomas Flügel-Paul, Matteo Genoni, Marcos Hernandez, Jari Kotilainen, Gianluca Li Causi, Seppo Mattila, Kalyan Radhakrishnan, Davide Ricci, Marco Riva, Susann Sadlowski, Bernardo Salasnich, Stephen Smartt, Ricardo Zanmar Sanchez, Maximilian Stritzinger, Hector Ventura

Proceedings Volume 11447, 114475L (2020) https://doi.org/10.1117/12.2560644

KEYWORDS: Sensors, Optics manufacturing, Spectrographs, Optical instrument design, New and emerging technologies, Telescopes, Optical design, Spectral resolution, Mechanical engineering, Optical components

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Échelle grating with improved polarization characteristics used for Earth observation

Susann Sadlowski, Torsten Harzendorf, Stefan Schwinde, Frank Burmeister, Dirk Michaelis, Thomas Flügel-Paul, Uwe Zeitner

Proceedings Volume 11451, 114511D (2020) https://doi.org/10.1117/12.2562546

KEYWORDS: Polarization, Diffraction gratings, Optics manufacturing, Optical design, Crystals, Diffraction, Silicon, Earth's atmosphere, Spectroscopic atmospheric monitoring techniques, Spectral resolution

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Proceedings Article | 12 July 2019 Open Access

Open Access

Paper

All-dielectric prism-grating-prism component realized by direct hydrophilic bonding technology for optical applications in space

Thomas Flügel-Paul, Carolin Rothhardt, Tino Benkenstein, Kevin Grabowski, Stefan Risse, Ramona Eberhardt, Benedikt Guldimann, Uwe Zeitner

Proceedings Volume 11180, 1118014 (2019) https://doi.org/10.1117/12.2535959

KEYWORDS: Prisms, Diffraction gratings, Diffraction, Silica, Manufacturing, Interfaces, Prototyping, Antireflective coatings, Optical design, Binary data

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Proceedings Article | 12 July 2019 Open Access

Open Access

Paper

Binary blazed reflection grating for UV/VIS/NIR/SWIR spectral range

Frank Burmeister, Thomas Flügel-Paul, Uwe Zeitner, Mane-Si-Laure Lee Bouhours, Gaëlle Lehoucq, Julie Cholet, Brigitte Loiseaux, Nicolas Tetaz, Roman Windpassinger, Matteo Taccola

Proceedings Volume 11180, 111801J (2019) https://doi.org/10.1117/12.2535974

KEYWORDS: Diffraction gratings, Diffraction, Binary data, Optical design, Manufacturing, Nanoimprint lithography, Prototyping, Electron beam lithography, Ultraviolet radiation, Silicon

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Proceedings Article | 6 September 2018 Presentation + Paper

Presentation + Paper

Surface relief gratings manufactured by lithographic means being a candidate for VLT MOONS instrument’s main dispersers

Torsten Harzendorf, Dirk Michaelis, Thomas Flügel-Paul, Andrea Bianco, Ernesto Oliva, Uwe Zeitner

Proceedings Volume 10706, 1070621 (2018) https://doi.org/10.1117/12.2313164

KEYWORDS: Diffraction gratings, Lithography, Diffraction, Electron beam lithography, Chromium, Binary data, Optical design, Polarization, Etching, Tolerancing

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Proceedings Article | 10 July 2018 Paper

Paper

Higher dispersion and efficiency Bragg gratings for optical spectroscopy

Will Saunders, Kai Zhang, Thomas Flügel-Paul

Proceedings Volume 10706, 107065C (2018) https://doi.org/10.1117/12.2313958

KEYWORDS: Spectrographs, Polarization, Refractive index, Optical design, Prisms, Astronomy, Astronomical imaging, Cameras, Telescopes, Silica

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Proceedings Article | 15 June 2018 Paper

Paper

Diffuse scattering of lamellar optical gratings due to line edge roughness

Martin Heusinger, Michael Banasch, Dirk Michaelis, Thomas Flügel-Paul, Uwe Zeitner

Proceedings Volume 10692, 106920I (2018) https://doi.org/10.1117/12.2314579

KEYWORDS: Diffraction gratings, Scattering, Line edge roughness, Light scattering, Diffraction, Optical design, Spectroscopy, Stray light

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Proceedings Article | 25 September 2017 Open Access

Open Access

Paper

Grism manufacturing by low temperature mineral bonding

G. Kalkowski, K. Grabowski, G. Harnisch, T. Flügel-Paul, U. Zeitner, S. Risse

Proceedings Volume 10562, 1056204 (2017) https://doi.org/10.1117/12.2296039

KEYWORDS: Prisms, Manufacturing, Glasses, Chemical elements, Silica, Binary data, Optical alignment, Astronomical imaging, Minerals, Interfaces

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By uniting a grating with a prism to a GRISM compound, the optical characteristics of diffractive and refractive elements can be favorably combined to achieve outstanding spectral resolution features. Ruling the grating structure into the prism surface is common for wavelengths around 1 μm and beyond, while adhesive bonding of two separate parts is generally used for shorter wavelengths and finer structures. We report on a manufacturing approach for joining the corresponding glass elements by the technology of hydrophilic direct bonding. This allows to manufacture the individual parts separately and subsequently combine them quasimonolithically by generating stiff and durable bonds of vanishing thickness, high strength and excellent transmission. With this approach for GRISM bonding, standard direct-write- or mask-lithography equipment may be used for the fabrication of the grating structure and the drawbacks of adhesive bonding (thermal mismatch, creep, aging) are avoided. The technology of hydrophilic bonding originates from “classical” optical contacting [1], but has been much improved and perfected during the last decades in the context of 3-dimensinal stacking Si-wafers for microelectronic applications [2]. It provides joins through covalent bonds of the Si-O-Si type at the nanometer scale, i.e. the elementary bond type in many minerals and glasses. The mineral nature of the bond is perfectly adapted to most optical materials and the extremely thin bonding layers generated with this technology are well suited for transmission optics. Creeping under mechanical load, as commonly observed with adhesive bonding, is not an issue. With respect to diffusion bonding, which operates at rather high temperatures close to the glass transition or crystal melting point, hydrophilic bonding is a low temperature process that needs only moderate heating. This facilitates provision of handling and alignment means for the individual parts during the set-up stages and greatly eases joining optical materials of different thermal expansion. The technology has been successfully used in the past for bonding various glasses as well as crystalline optical materials [3, 4]. Here we will focus on bonding prisms elements and binary gratings of fused silica with and without coatings at the bonding interface. Further, preliminary results on bonding prism-grating-prism (PGP) combinations will be presented.

Proceedings Article | 25 September 2017 Open Access

Open Access

Paper

Development of the flight models for the Sentinel-4/UVN NIR-grating unit

U. Zeitner, A. Kamm, T. Benkenstein, T. Flügel-Paul, G. Leibeling

Proceedings Volume 10562, 1056202 (2017) https://doi.org/10.1117/12.2296070

KEYWORDS: Diffraction gratings, Dielectric polarization, Diffraction, Near infrared, Optical design, Dielectrics, Astronomical imaging, Reflection, Spectroscopy, Optical mounts

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Proceedings Article | 27 September 2016 Paper

Paper

Optical design and tolerancing of a hyperspectral imaging spectrometer

Chang Liu, Christoph Straif, Thomas Flügel-Paul, Uwe Zeitner, Herbert Gross

Proceedings Volume 9947, 994703 (2016) https://doi.org/10.1117/12.2238758

KEYWORDS: Tolerancing, Spectroscopy, Optical design, Hyperspectral imaging, Distortion, Aspheric lenses, Mirrors, Reflection, Manufacturing, Diffraction gratings

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Proceedings Article | 22 July 2016 Paper

Paper

New grating concepts in the NIR and SWIR spectral band for high resolution earth-observation spectrometers

T. Flügel-Paul, G. Kalkowski, T. Benkenstein, T. Harzendorf, A. Matthes, U. Zeitner

Proceedings Volume 9912, 99122A (2016) https://doi.org/10.1117/12.2232538

KEYWORDS: Diffraction gratings, Diffraction, Polarization, Coating, Silica, Spectrometers, Atomic layer deposition, Near infrared, Manufacturing, Refractive index

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Proceedings Article | 14 March 2016 Paper

Paper

Investigation and optimization of Rowland ghosts in high efficiency spectrometer gratings fabricated by e-beam lithography

Martin Heusinger, Michael Banasch, Thomas Flügel-Paul, Uwe Zeitner

Proceedings Volume 9759, 97590A (2016) https://doi.org/10.1117/12.2211000

KEYWORDS: Spectroscopy, Electron beam lithography, Stray light, Diffraction gratings, Diffraction, Calibration, Light scattering, Laser scattering, Scattering, Electron beams, Astronomical spectrometers, Spectrometers, Neptunium, Optical testing, Sensors, Optical design, Binary data

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Showing 5 of 15 publications

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