Dr. Ulrike Willer Profile

Dr. Ulrike Willer

Project Development at Energie-Forschungszentrum Niedersachsen

SPIE Involvement:

Conference Program Committee | Author

Proceedings Article | 11 March 2024 Presentation + Paper

Non-destructive technique for characterization fiber Bragg gratings via diffraction profile

Vladislav Reimer, Ahmad Abdalwareth, Günter Flachenecker, Ulrike Willer, Martin Angelmahr, Wolfgang Schade

Proceedings Volume 12893, 128930N (2024) https://doi.org/10.1117/12.3002504

KEYWORDS: Fiber Bragg gratings, Diffraction gratings, Diffraction, Optical fibers, Refractive index, Optical gratings, Bragg wavelengths

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Proceedings Article | 3 June 2015 Paper

Photoacoustic sensing with micro-tuning forks

U. Willer, M. Köhring, M. Mordmüller, W. Schade

Proceedings Volume 9482, 94820B (2015) https://doi.org/10.1117/12.2182583

KEYWORDS: Photoacoustic spectroscopy, Methane, Sensors, Quartz, Acoustics, Resonators, Nitrogen, Signal generators, Modulation, Signal processing

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Proceedings Article | 3 June 2015 Paper

New design for a wavelength demultiplexing device

Konrad Bethmann, Rozalia Orghici, Elke Pichler, Urs Zywietz, Thomas Schimdt, Uwe Gleissner, Christian Kelb, Bernhard Roth, Carsten Reinhardt, Ulrike Willer, Wolfgang Schade

Proceedings Volume 9480, 948010 (2015) https://doi.org/10.1117/12.2183328

KEYWORDS: Waveguides, Polymers, Wave propagation, Refractive index, Computer aided design, Spectrometers, Microscopes, Light wave propagation, Waveguide modes, Optical design

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Proceedings Article | 13 May 2015 Paper

Ring resonators in polymer foils for sensing of gaseous species

Elke Pichler, Konrad Bethmann, Urs Zywietz, Christian Spad, Uwe Gleissner, Christian Kelb, Bernhard Roth, Carsten Reinhardt, Ulrike Willer, Wolfgang Schade

Proceedings Volume 9486, 948613 (2015) https://doi.org/10.1117/12.2183336

KEYWORDS: Waveguides, Resonators, Polymers, Refractive index, Surface roughness, Polymer multimode waveguides, Sensors, Cladding, Scattering, Polymethylmethacrylate

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Proceedings Article | 24 January 2011 Paper

Photonic sensors for explosive detection

Ulrike Willer, Rozalia Orghici, Peter Lützow, Wolfgang Schade

Proceedings Volume 7945, 79452D (2011) https://doi.org/10.1117/12.872856

KEYWORDS: Sensors, Molecules, Resonators, Receptors, Waveguides, Microrings, Coating, Explosives detection, Explosives, Refraction

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SPIE Journal Paper | 1 November 2010

Use of quantum cascade lasers for detection of explosives: progress and challenges

Christoph Bauer, Ulrike Willer, Wolfgang Schade

OE, Vol. 49, Issue 11, 111126, (November 2010) https://doi.org/10.1117/12.10.1117/1.3498771

KEYWORDS: Quantum cascade lasers, Sensors, Explosives, Absorption, Explosives detection, Spectroscopy, Photoacoustic spectroscopy, Molecules, Head, Laser applications

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Proceedings Article | 16 May 2008 Paper

Fiber-optic evanescent-field sensor device for CO2 and explosive detection

W. Schade, R. Orghici, U. Willer, S. Waldvogel

Proceedings Volume 7004, 700431 (2008) https://doi.org/10.1117/12.786017

KEYWORDS: Sensors, Carbon dioxide, Fiber optics sensors, Receptors, Absorption, Molecules, Fiber optics, Explosives detection, Explosives, Reflection

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Proceedings Article | 9 June 2004 Paper

Infrared evanescent-field fiber sensor for in situ mapping of volcano gases

Ulrike Willer, Christian Bohling, Peter Geiser, Wolfgang Schade

Proceedings Volume 5502, (2004) https://doi.org/10.1117/12.566699

KEYWORDS: Gases, Sensors, Fiber optics sensors, Carbon dioxide, Chemical analysis, Infrared sensors, Fiber optics, Fiber lasers, Laser optics, Spectroscopy

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Proceedings Article | 26 February 2001 Paper

MIR evanescent-field fiber sensors

Ulrike Willer, Torsten Blanke, Wolfgang Schade

Proceedings Volume 4205, (2001) https://doi.org/10.1117/12.417455

KEYWORDS: Semiconductor lasers, Fiber optics sensors, Sensors, Fiber lasers, Absorption, Spectroscopy, Refraction, Molecules, Signal processing, Difference frequency generation

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Proceedings Article | 16 September 1999 Paper

Spectroscopic applications of a widely tunable (6.8 to 12.5 um) cw DFG laser spectrometer

Torsten Blanke, Ulrike Willer, Wolfgang Schade

Proceedings Volume 3821, (1999) https://doi.org/10.1117/12.364174

KEYWORDS: Spectroscopy, Semiconductor lasers, Absorption, Mid-IR, Crystals, Molecules, Soil contamination, Signal processing, Tunable lasers, Laser crystals

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Proceedings Article | 21 October 1996 Paper

Diode laser MIR-DFG spectrometer for trace gas detection

Ulrike Willer, Torsten Blanke, Wolfgang Schade

Proceedings Volume 2834, (1996) https://doi.org/10.1117/12.255333

KEYWORDS: Carbon monoxide, Absorption, Spectroscopy, Crystals, Laser crystals, Silver thiogallate, Mid-IR, Semiconductor lasers, Nonlinear crystals, Phase matching

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Showing 5 of 11 publications

Conference Committee Involvement (9)

Next-Generation Spectroscopic Technologies XVI

22 April 2024 | National Harbor, Maryland, United States

Next-Generation Spectroscopic Technologies XV

1 May 2023 | Orlando, Florida, United States

Next-Generation Spectroscopic Technologies XIV

12 April 2021 | Online Only, Florida, United States

Next-Generation Spectroscopic Technologies XIII

27 April 2020 | Online Only, California, United States

Next-Generation Spectroscopic Technologies XII

15 April 2019 | Baltimore, MD, United States

Showing 5 of 9 Conference Committees

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