Prof. Karl-Friedrich Klein Profile

Prof. Karl-Friedrich Klein

RETIRED

SPIE Involvement:

Conference Program Committee | Author

Publications (82)

Proceedings Article | 12 March 2024 Presentation + Paper

Characterization of multi-clad fibers: approaches to measure the beam divergence angle and its degradation in the fiber

Dörte Schönfeld, Daniel Reul, Philipp Raithel, Karl-Friedrich Klein, Andreas Langner

Proceedings Volume 12878, 1287805 (2024) https://doi.org/10.1117/12.3000461

KEYWORDS: Beam diameter, Beam divergence, Polishing, Silica, Image analysis, Quality control, Light emitting diodes, Fiber lasers, Cladding, Cameras

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Proceedings Article | 6 March 2023 Presentation + Paper

Influence of light-sources on UV fiber damage measured with DIN standard 58145

Philipp Raithel, Andreas Langner, Mathias Belz, Steffen Kaiser, Daniel Reul, Karl-Friedrich Klein

Proceedings Volume 12372, 123720A (2023) https://doi.org/10.1117/12.2665987

KEYWORDS: Ultraviolet radiation, Silica, Signal attenuation, Spectroscopy, Lamps, Deep ultraviolet, Imaging systems, Fiber optics

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Proceedings Article | 19 November 2021 Presentation + Paper

Generation of UV-defects in UV fibers: comparison between different pulsed UV lasers

Stefan Heiden, Philipp Raithel, Karl-Friedrich Klein, Georg Hillrichs

Proceedings Volume 11910, 119100O (2021) https://doi.org/10.1117/12.2597970

KEYWORDS: Optical fibers, Annealing, Ultraviolet radiation, Silica, Hydrogen, Absorption, Pulsed laser operation, Nd:YAG lasers

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Proceedings Article | 5 March 2021 Presentation + Paper

Long-term degradation of UV fibers using broadband light sources

Karl-Friedrich Klein, S. Heiden, Philipp Raithel, R. Yadav, Hanns Simon Eckhardt, Mathias Belz

Proceedings Volume 11635, 1163505 (2021) https://doi.org/10.1117/12.2585216

KEYWORDS: Ultraviolet radiation, Spectroscopy, Fiber optics, Signal attenuation, Resistance, Pulsed laser operation, Process control, Nd:YAG lasers, Absorption

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Proceedings Article | 5 March 2021 Presentation + Paper

Characterization of a fast response fiber-optic pH sensor and measurements in a biological application

Jan Werner, Mathias Belz, Karl-Friedrich Klein, Tong Sun, K. T. Grattan

Proceedings Volume 11635, 116350A (2021) https://doi.org/10.1117/12.2585735

KEYWORDS: Fiber optics sensors, Sensors, Fiber optics, Fiber optics tests, Temperature metrology, Specialty optical fibers, Optical sensing, Life sciences, Environmental monitoring, Biological research

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Proceedings Article | 20 October 2020 Poster + Presentation + Paper

213 nm Nd-YAG pulsed laser damage of non-loaded and hydrogen-loaded silica-based fibers

Stefan Heiden, Philipp Raithel, Rahul Yadav, Karl-Friedrich Klein

Proceedings Volume 11514, 115141Q (2020) https://doi.org/10.1117/12.2574380

KEYWORDS: Hydrogen, Silica, Nd:YAG lasers, Laser induced damage, Pulsed laser operation, Signal attenuation, Absorption, Ultraviolet radiation, Annealing, High power lasers

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Proceedings Article | 21 February 2020 Paper

Fast response time fiber optical pH and oxygen sensors

Jan Werner, Mathias Belz, Karl-Friedrich Klein, Tong Sun, K. T. V. Grattan

Proceedings Volume 11233, 112331K (2020) https://doi.org/10.1117/12.2566993

KEYWORDS: Sensors, Fiber optics sensors, Luminescence, Oxygen, Fiber optics, Coating, Sensor calibration, Optical fibers

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Proceedings Article | 16 November 2018 Paper

Silica-based MM-fiber system: defect generation during pulsed UV Nd-YAG laser irradiations

Philipp Raithel, Rahul Yadav, John Shannon, Rick Timmerman, Bode Kuehn, Karl-Friedrich Klein

Proceedings Volume 10805, 108050M (2018) https://doi.org/10.1117/12.2502114

KEYWORDS: Ultraviolet radiation, Fiber lasers, Pulsed laser operation, Absorption, Signal attenuation, Silica, Nd:YAG lasers, Active optics, Laser induced damage, UV optics

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Proceedings Article | 9 May 2018 Presentation + Paper

Transmission of few-mode fibers at 355 nm using pulsed Nd-YAG laser

Philipp Raithel, Karl-Friedrich Klein, Mathias Belz, Georg Hillrichs

Proceedings Volume 10681, 1068103 (2018) https://doi.org/10.1117/12.2302953

KEYWORDS: Optical fibers, Pulsed laser operation, Ultraviolet radiation, Silica, Absorption, Nd:YAG lasers, Multimode fibers

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Proceedings Article | 3 March 2017 Paper

Short- and long-term damage and annealing of improved UV-fibers using broadband UV light-source

Philipp Raithel, Arne Zimmer, Karl-Friedrich Klein, Mathias Belz

Proceedings Volume 10058, 1005811 (2017) https://doi.org/10.1117/12.2257517

KEYWORDS: Absorption, Silicon, Imaging systems, Near infrared, Fiber couplers, Chlorine, Annealing, Ultraviolet radiation, Light sources, Lamps, Multimode fibers, Step index fibers, Optical fibers

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Proceedings Article | 27 April 2016 Paper

Analysis of spectral light guidance in specialty fibers

Arne Zimmer, Philipp Raithel, Mathias Belz, Karl-Friedrich Klein

Proceedings Volume 9886, 98860Y (2016) https://doi.org/10.1117/12.2230837

KEYWORDS: Near field, Surface roughness, High dynamic range imaging, Polishing, Structured optical fibers, Image processing, Microscopes, Semiconductor lasers, Cameras, Scattering

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Proceedings Article | 17 March 2016 Presentation + Paper

Fiber optic biofluorometer for physiological research on muscle slices

Mathias Belz, Andreas Dendorfer, Jan Werner, Daniel Lambertz, Karl-Friedrich Klein

Proceedings Volume 9702, 97020Q (2016) https://doi.org/10.1117/12.2220291

KEYWORDS: Tissues, Microscopes, Luminescence, Calcium, Fiber optics, Light emitting diodes, Polymethylmethacrylate, Signal detection, Fluorescence spectroscopy, Mirrors

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Proceedings Article | 7 March 2016 Presentation + Paper

Manufacture of micro fluidic devices by laser welding using thermal transfer printing techniques

R. Klein, K. F. Klein, T. Tobisch, D. Thoelken, M. Belz

Proceedings Volume 9702, 970205 (2016) https://doi.org/10.1117/12.2219997

KEYWORDS: Microfluidics, Laser welding, Printing, Manufacturing, Microfluidic imaging, Imaging devices, Laser optics, Coating, Medical diagnostics, Medical research, Laser processing, Nonimpact printing, Polymethylmethacrylate, Semiconductor lasers, Chemical analysis

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Proceedings Article | 7 May 2015 Paper

Light-guidance in step-index fibers with non-circular shaped core

Jan Heimann, Philipp Raithel, Tim Tobisch, Mathias Belz, Karl-Friedrich Klein

Proceedings Volume 9507, 95070R (2015) https://doi.org/10.1117/12.2182346

KEYWORDS: Step index fibers, Near field, Cladding, Fiber lasers, Astronomy, Scattering, Cameras, Specialty optical fibers, Fiber optics, Signal attenuation

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Proceedings Article | 23 March 2015 Open Access

UV-fibers: two decades of improvements for new applications

Karl-Friedrich Klein, Valery Khalilov

Proceedings Volume 9317, 93170S (2015) https://doi.org/10.1117/12.2085670

KEYWORDS: Ultraviolet radiation, Absorption, Fiber optics, Silica, Signal attenuation, Silicon, Lamps, Sensors, Luminescence, Spectroscopy

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Proceedings Article | 12 March 2015 Paper

UV and VIS far field intensity profile of optical fiber based flow cells

Jan Werner, Mathias Belz, Karl-Friedrich Klein

Proceedings Volume 9317, 93170A (2015) https://doi.org/10.1117/12.2086989

KEYWORDS: Refractive index, Waveguides, Optical fibers, Liquids, Light emitting diodes, Charge-coupled devices, Ultraviolet radiation, Capillaries, Cladding, Coating

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SPIE Journal Paper | 2 September 2014

Investigation of single-mode fiber degradation by 405-nm continuous-wave laser light

Cornell Gonschior, Karl-Friedrich Klein, Matthias Menzel, Tong Sun, Kenneth Grattan

OE, Vol. 53, Issue 12, 122512, (September 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.12.122512

KEYWORDS: Single mode fibers, Medium wave, Fiber lasers, Continuous wave operation, Silica, Spherical lenses, Structured optical fibers, Sensors, Particles, Semiconductor lasers

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Proceedings Article | 2 May 2014 Paper

Influence of fiber design on light-guidance in step-index fibers for bundle applications in the UV-VIS-region

H. Ohlmeyer, T. Tobisch, M. M. A. J. Voncken, L. Prechtel, M. Belz, K.-F. Klein

Proceedings Volume 9128, 912809 (2014) https://doi.org/10.1117/12.2054379

KEYWORDS: Cladding, Signal attenuation, Step index fibers, Refractive index, Apodization, Silica, Interfaces, Coating, Graded index fibers, Multimode fibers

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Proceedings Article | 20 February 2014 Paper

Improvement of optical damage in specialty fiber at 266 nm wavelength

T. Tobisch, H. Ohlmeyer, H. Zimmermann, S. Prein, J. Kirchhof, S. Unger, M. Belz, K.-F. Klein

Proceedings Volume 8938, 89380G (2014) https://doi.org/10.1117/12.2041798

KEYWORDS: Fiber lasers, Pulsed laser operation, Ultraviolet radiation, Nd:YAG lasers, Lamps, Absorption, Silica, Fiber optics, Hydrogen, Laser applications

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Proceedings Article | 14 November 2013 Paper

Investigation of single-mode fiber output damage by 405nm CW laser light

C. Gonschior, E. Landrock-Bill, K.-F. Klein, T. Sun, K. T. V. Grattan

Proceedings Volume 8885, 888514 (2013) https://doi.org/10.1117/12.2030263

KEYWORDS: Single mode fibers, Particles, Silica, Fiber lasers, Scanning electron microscopy, Continuous wave operation, Semiconductor lasers, Ultraviolet radiation, Polarization, Spherical lenses

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Proceedings Article | 3 May 2013 Paper

Silica-based UV-fibers for DUV applications: current status

K.-F. Klein, C. Gonschior, D. Beer, H.-S. Eckhardt, M. Belz, J. Shannon, V. Khalilov, M. Klein, C. Jakob

Proceedings Volume 8775, 87750B (2013) https://doi.org/10.1117/12.2020993

KEYWORDS: Ultraviolet radiation, Optical fibers, Lamps, Silica, Light sources, Absorption, Fiber optics, Nd:YAG lasers, Signal attenuation, Silicon

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Proceedings Article | 20 March 2013 Paper

Optical fibers for 355nm pulsed lasers and high-power broadband light sources

Jan Heimann, Karl-Friedrich Klein, Cornell Gonschior, Moritz Klein, Georg Hillrichs

Proceedings Volume 8576, 85760K (2013) https://doi.org/10.1117/12.2005146

KEYWORDS: Lamps, Optical fibers, Silica, Pulsed laser operation, Absorption, Fiber lasers, Light sources, Nd:YAG lasers, Fiber optics, Ultraviolet radiation

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Proceedings Article | 26 February 2013 Paper

High power 405nm diode laser fiber-coupled single-mode system with high long-term stability

C. Gonschior, K.-F. Klein, D. Heyse, S. Baumann, T. Sun, K. T. Grattan

Proceedings Volume 8605, 86050O (2013) https://doi.org/10.1117/12.2003888

KEYWORDS: Single mode fibers, Semiconductor lasers, Silica, Fiber lasers, Laser systems engineering, Power meters, Polarization, Interfaces, Structured optical fibers, Glasses

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Proceedings Article | 4 December 2012 Paper

Surface and bulk effects in silica fibers caused by 405 nm CW diode laser irradiation and means for mitigation

C. Gonschior, K.-F. Klein, T. Sun, K. T. Grattan

Proceedings Volume 8530, 85300A (2012) https://doi.org/10.1117/12.976837

KEYWORDS: Single mode fibers, Continuous wave operation, Semiconductor lasers, Silica, Absorption, Ultraviolet radiation, Pulsed laser operation, Fiber lasers, Color centers, Atomic force microscopy

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Proceedings Article | 26 April 2012 Paper

Influence of high power 405 nm multi-mode and single-mode diode laser light on the long-term stability of fused silica fibers

C. Gonschior, K.-F. Klein, T. Sun, K. Grattan

Proceedings Volume 8426, 84260P (2012) https://doi.org/10.1117/12.923138

KEYWORDS: Semiconductor lasers, Single mode fibers, Polarization, Phase modulation, Color centers, Continuous wave operation, Pulsed laser operation, Optical fibers, Fiber lasers, Silica

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Proceedings Article | 17 February 2012 Paper

Broadband ATR-sensor with variable path lengths

Karl-Friedrich Klein, Subash Pandey, Pasma Dahal, Moritz Klein, Mathias Belz, Georg Hillrichs

Proceedings Volume 8218, 82180T (2012) https://doi.org/10.1117/12.909059

KEYWORDS: Absorption, Cladding, Signal attenuation, Polymers, Liquids, Sensors, Spectroscopy, Optical fibers, Silica, Refractive index

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Proceedings Article | 1 February 2012 Paper

Lifetime prediction for 405-nm single-mode delivery systems for therapeutic laser applications

C. Gonschior, K.-F. Klein, T. Sun, K. T. V. Grattan, M. Kirshenbaum, E. Seibel

Proceedings Volume 8218, 82180A (2012) https://doi.org/10.1117/12.910700

KEYWORDS: Laser therapeutics, Single mode fibers, Phase modulation, Connectors, Semiconductor lasers, Polishing, Silica, Atomic force microscopy, Transmission electron microscopy, Laser systems engineering

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Proceedings Article | 17 February 2011 Paper

Performance of low mode and single mode optical fibers for high peak power 355 nm laser radiation

Georg Hillrichs, Cornell Gonschior, Karl-Friedrich Klein, René Wandschneider

Proceedings Volume 7894, 78940Z (2011) https://doi.org/10.1117/12.877836

KEYWORDS: Fiber lasers, Pulsed laser operation, Optical fibers, Single mode fibers, Laser damage threshold, Laser ablation, Laser applications, Ultraviolet radiation, Laser systems engineering, Silica

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Proceedings Article | 17 February 2011 Paper

Evanescent-field sensor using selectively excited modes in step-index fibers

Karl-Friedrich Klein, Cornell Gonschior, Pasma Dahal, Hanns Eckhardt, Mathias Belz, Georg Hillrichs

Proceedings Volume 7894, 789410 (2011) https://doi.org/10.1117/12.879284

KEYWORDS: Step index fibers, Signal attenuation, Sensors, Cladding, Spectroscopy, Silica, Light sources, Optical spheres, Optical fibers, Polymers

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Proceedings Article | 24 February 2010 Paper

Skew modes in specialty fibers with step-index profiles

Karl-Friedrich Klein, Cornell Gonschior, Ruan Xia, Georg Hillrichs, Martin Bloos, Hans Poisel

Proceedings Volume 7559, 755909 (2010) https://doi.org/10.1117/12.847046

KEYWORDS: Step index fibers, Phase only filters, Cladding, Polymers, Silica, Near field, Specialty optical fibers, Polymer optical fibers, Refractive index, Applied sciences

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Proceedings Article | 24 February 2010 Paper

Characterization of UV single-mode and low-mode fibers

C. Gonschior, D. Eimer, K.-F. Klein, T. Sun, K. T. V. Grattan

Proceedings Volume 7559, 75590X (2010) https://doi.org/10.1117/12.842641

KEYWORDS: Optical fibers, Single mode fibers, Ultraviolet radiation, Semiconductor lasers, Fiber lasers, Absorption, Sensors, Visible radiation, Photonic crystals, Imaging systems

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Proceedings Article | 24 February 2010 Paper

Suppression of modal noise in a multimode fiber optic delivery output from an ultra-broadband supercontinuum light source

Do-Hyun Kim, Karl-Friedrich Klein, Ilko Ilev

Proceedings Volume 7559, 75590U (2010) https://doi.org/10.1117/12.846973

KEYWORDS: Light sources, Single mode fibers, Lenses, Multimode fibers, Supercontinuum sources, Objectives, Light, Optical fibers, Photonic crystal fibers, Sensors

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Proceedings Article | 21 February 2009 Paper

Optical fibers in instrumental UV-analytics

Karl-Friedrich Klein, Joachim Mannhardt, Mathias Belz, Cornell Gonschior, Hanns S. Eckhardt

Proceedings Volume 7173, 717302 (2009) https://doi.org/10.1117/12.818663

KEYWORDS: Optical fibers, Fiber optics, Ultraviolet radiation, Connectors, Sensors, Absorbance, Analytics, Interfaces, Signal attenuation, Optical properties

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Proceedings Article | 21 February 2009 Paper

Mode field perturbations and numerical aperture broadening due to angular misalignment in multimode fiber coupling

Andreas Rose, Kyle Johnston, Karl-Friedrich Klein, Brian Catanzaro, Luis De Taboada

Proceedings Volume 7173, 71730Y (2009) https://doi.org/10.1117/12.824212

KEYWORDS: Fiber couplers, Multimode fibers, Fiber coupled lasers, Collimators, Imaging systems, Fiber lasers, Fiber to the x, Biomedical optics, LASIK, Tolerancing

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Proceedings Article | 19 February 2008 Paper

Quality control of UV resistant fibers for 200-300 nm spectroscopic applications

Mathias Belz, Hanns-S. Eckhardt, Cornell Gonschior, Gary Nelson, Karl-F. Klein

Proceedings Volume 6852, 685209 (2008) https://doi.org/10.1117/12.782447

KEYWORDS: Optical fibers, Signal attenuation, Ultraviolet radiation, Absorbance, Spectroscopy, Sensors, Silica, Fiber optics, Absorption, Annealing

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Proceedings Article | 7 February 2008 Paper

Transmission properties of polymer optical fibers for pulsed UV laser light

René Wandschneider, Karl-F. Klein, Georg Hillrichs

Proceedings Volume 6852, 68520T (2008) https://doi.org/10.1117/12.770604

KEYWORDS: Polymer optical fibers, Signal attenuation, Ultraviolet radiation, Pulsed laser operation, Nitrogen lasers, Fiber lasers, Nd:YAG lasers, Silica, Lamps, Applied sciences

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Proceedings Article | 15 February 2007 Paper

Fiber-optic detection device for GC-UV

Hanns-Simon Eckhardt, H. Dominick, Kenneth Grattan, Konrad Graubner, Karl-Friedrich Klein, Bernd Spangenberg, Tong Sun

Proceedings Volume 6433, 64330D (2007) https://doi.org/10.1117/12.717694

KEYWORDS: Absorption, Ultraviolet radiation, Sensors, Fiber optics, Spectroscopy, Statistical analysis, Spectrophotometry, Imaging systems, Ultraviolet detectors, Spectral resolution

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Proceedings Article | 15 February 2007 Paper

New components for fiber-optic thin-layer chromatography including fluorescence

Michaela Bleichert, Hanns Simon Eckhardt, Karl-Friedrich Klein, Bernd Spangenberg, Georg Hillrichs, Joachim Mannhardt

Proceedings Volume 6433, 64330F (2007) https://doi.org/10.1117/12.717579

KEYWORDS: Luminescence, Absorption, Fiber optics, Chromatography, Connectors, Fiber optics tests, Fiber optic components, Spectroscopy, Head, Applied sciences

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Proceedings Article | 19 October 2006 Paper

Fiber optic sample cells for polychromatic detection of dissolved and particulate matter in natural waters

Mathias Belz, Kai Larsen, Karl-Friedrich Klein

Proceedings Volume 6377, 63770X (2006) https://doi.org/10.1117/12.715011

KEYWORDS: Absorption, Waveguides, Optical filters, Absorption filters, Silica, Liquids, Scattering, Refractive index, Light scattering, Fiber optics

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Proceedings Article | 15 February 2006 Paper

Fiber-optic based gas sensing in the UV region

H. S. Eckhardt, K. Graubner, K.-F. Klein, T. Sun, K. T. V. Grattan

Proceedings Volume 6083, 60830A (2006) https://doi.org/10.1117/12.647753

KEYWORDS: Absorption, Gases, Ultraviolet radiation, Optical fibers, Spectroscopy, Sensors, Nitrogen, Oxygen, Fiber optics, Signal to noise ratio

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Proceedings Article | 15 February 2006 Paper

High-OH fibers with higher stability in the UV-region

Valery Kh. Khalilov, Karl-Friedrich Klein, Jalal Belmahdi, Rick Timmerman, Gary Nelson

Proceedings Volume 6083, 608308 (2006) https://doi.org/10.1117/12.651639

KEYWORDS: Optical fibers, Absorption, Silicon, Signal attenuation, Silica, Hydrogen, Control systems, Fiber optics, Ultraviolet radiation, Camera shutters

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Proceedings Article | 15 February 2006 Paper

Fiber-delivery system for high-power UV-A lightsources

Sascha Bohnert, Karl-F. Klein, Dieter Dinges, Wolfgang Fürstenberg, Demetri Kalymnios

Proceedings Volume 6083, 60830T (2006) https://doi.org/10.1117/12.668027

KEYWORDS: Phase only filters, Optical fibers, Light sources, Signal attenuation, Imaging systems, Polymer optical fibers, Fiber optics, Diodes, Light emitting diodes, Sensors

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Proceedings Article | 23 May 2005 Paper

UV-optically based gas sensing with potential application to exhaust gas monitoring

H. Eckhardt, K. Grattan, K.-F. Klein, L. Lagesson-Andrasko, V. Lagesson, T. Sun

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.623807

KEYWORDS: Absorption, Gases, Nitrogen, Oxygen, Ultraviolet radiation, Spectral resolution, Optical fibers, Spectroscopy, Combustion, Sensors

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Proceedings Article | 23 March 2005 Paper

High NA-fibers: silica-based fibers for new applications

Karl-Friedrich Klein, Hanns Eckhardt, Christiane Vincze, Stephan Grimm, Johannes Kirchhof, Jens Kobelke, Jim Clarkin, Gary Nelson

Proceedings Volume 5691, (2005) https://doi.org/10.1117/12.591683

KEYWORDS: Optical fibers, Cladding, Bridges, Silica, Signal attenuation, Polymers, Refractive index, Solids, Molecular bridges, Sodium

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Proceedings Article | 16 February 2005 Paper

PCS optical fibers for an automobile data bus

James Clarkin, Richard Timmerman, Gary Stolte, Karl-Friedrich Klein

Proceedings Volume 5663, (2005) https://doi.org/10.1117/12.596900

KEYWORDS: Phase only filters, Optical fibers, Signal attenuation, Silica, Data communications, Cladding, Temperature metrology, Polymethylmethacrylate, Glasses, Optics manufacturing

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Proceedings Article | 24 September 2004 Paper

New age fibers: the children of the photonic revolution

Roger Haynes, Joss Bland-Hawthorn, Maryanne Large, Karl-Friedrich Klein, Gary Nelson

Proceedings Volume 5494, (2004) https://doi.org/10.1117/12.550991

KEYWORDS: Optical fibers, Astronomy, Cladding, Ultraviolet radiation, Photonic crystal fibers, Manufacturing, Polymers, Refractive index, Photonic crystals, Telescopes

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Proceedings Article | 24 September 2004 Paper

All-silica fiber with low or medium OH-content for broadband applications in astronomy

Saleh Ferwana, Hanns-Simon Eckhardt, Thorsten Simon, Karl-Friedrich Klein, Roger Haynes, Valery Khalilov, Gary Nelson

Proceedings Volume 5494, (2004) https://doi.org/10.1117/12.568231

KEYWORDS: Signal attenuation, Astronomy, Silica, Absorption, Ultraviolet radiation, Fiber optics, Spectroscopy, Solids, Near infrared, Fiber lasers

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Proceedings Article | 9 July 2004 Paper

Future directions for microstructured polymer optical fibers

Maryanne Large, Alexander Argyros, Geoff Barton, Felicity Cox, Geoffrey Henry, Nader Issa, Steven Manos, Whayne Padden, Leon Poladian, Martijn van Eijkelenborg, Alexander Bachmann, Karl-Friedrich Klein, Hans Poisel

Proceedings Volume 5360, (2004) https://doi.org/10.1117/12.531138

KEYWORDS: Polymers, Phase only filters, Optical fibers, Signal attenuation, Polymer optical fibers, Multimode fibers, Structured optical fibers, Doping, Diffusion, Endoscopy

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Proceedings Article | 10 June 2004 Paper

Low-OH all-silica fiber with broadband transparency and radiation resistance in the UV region

Valery Khalilov, Karl-Friedrich Klein, Gary Nelson

Proceedings Volume 5317, (2004) https://doi.org/10.1117/12.540732

KEYWORDS: Hydrogen, Chlorine, Signal attenuation, Silicon, Absorption, Silica, Resistance, Ultraviolet radiation, Transparency, Optical fibers

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Proceedings Article | 10 June 2004 Paper

Further improvements of high-precision gas analysis in DUV region

Hanns Eckhardt, Klaus Behler, Matthias Frank, Kenneth Grattan, Karl-Friedrich Klein, R. Koetschau, Uwe Schroeder

Proceedings Volume 5317, (2004) https://doi.org/10.1117/12.540736

KEYWORDS: Absorption, Spectroscopy, Waveguides, Spectral resolution, Ultraviolet radiation, Sensors, Lamps, Nitrogen, Deep ultraviolet, Signal to noise ratio

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Proceedings Article | 10 June 2004 Paper

Flexible hollow-core waveguides for CO2 lasers: potential and limitations as beam guiding systems for medical applications

Klaus Behler, Karl-Friedrich Klein, Jutta Johannis

Proceedings Volume 5317, (2004) https://doi.org/10.1117/12.530219

KEYWORDS: Waveguides, Absorption, Beam guidance systems, Laser beam propagation, Solids, Signal attenuation, Silica, Gas lasers, Capillaries, Carbon monoxide

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Proceedings Article | 9 June 2004 Paper

Gas analysis in the UV region: a hollow-core waveguide sensor system

Hanns Eckhardt, H. Dominick, Matthias Frank, Kenneth Grattan, Karl-Friedrich Klein

Proceedings Volume 5502, (2004) https://doi.org/10.1117/12.566549

KEYWORDS: Absorption, Waveguides, Ultraviolet radiation, Sensors, Optical fibers, Spectroscopy, Deep ultraviolet, Waveguide sensors, Nitrogen, Mass attenuation coefficient

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Proceedings Article | 1 July 2003 Paper

Gas analysis in the UV region using a long-length hollow core waveguide

R. Kotschau, Hanns-S. Eckhardt, Karl-Friedrich Klein, Klaus Behler, Georg Hillrichs

Proceedings Volume 4957, (2003) https://doi.org/10.1117/12.478062

KEYWORDS: Absorption, Gases, Sensors, Waveguides, Ozone, Optical fibers, Nitrogen, Silica, Ultraviolet radiation, Signal attenuation

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Proceedings Article | 1 July 2003 Paper

Side- and end-illumination of polymer optical fibers in the UV region

Hanns-S. Eckhardt, B. Jungling, Karl-Friedrich Klein, Hans Poisel

Proceedings Volume 4957, (2003) https://doi.org/10.1117/12.478064

KEYWORDS: Phase only filters, Optical fibers, Signal attenuation, Polymer optical fibers, Sensors, Fiber optics, Lamps, Polymethylmethacrylate, Manufacturing, Fiber optics sensors

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Proceedings Article | 1 July 2003 Paper

Status and improvements of the UV laser scalpel

Marco Kohler, Hartmut Dietz, Yuji Matsuura, Mitsunobu Miyagi, Karl-Friedrich Klein, Georg Hillrichs

Proceedings Volume 4957, (2003) https://doi.org/10.1117/12.478065

KEYWORDS: Optical fibers, Fiber lasers, Absorption, Ultraviolet radiation, Sensors, Attenuators, Laser applications, Fusion energy, Pulsed laser operation, Tissues

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Proceedings Article | 9 April 2003 Paper

Trends in polymer optical fibers

Hans Poisel, Olaf Ziemann, Karl-Friedrich Klein

Proceedings Volume 5131, (2003) https://doi.org/10.1117/12.513636

KEYWORDS: Phase only filters, Optical fibers, Cladding, Coating, Polymer optical fibers, Data communications, Polymethylmethacrylate, Near field optics, Polymers, Electromagnetism

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Proceedings Article | 9 April 2003 Paper

Fluorescent polymer optical fibers (FPOF) for new applications

Karl-Friedrich Klein, Hans Poisel, Demetrios Kalymnios

Proceedings Volume 5131, (2003) https://doi.org/10.1117/12.513635

KEYWORDS: Optical fibers, Sensors, Polymer optical fibers, Absorption, Phase only filters, Luminescence, Optical sensors, Signal attenuation, Light sources, Cladding

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Proceedings Article | 25 June 2002 Paper

Measurement equipment for long-term testing of polymer optical fibers

B. Guenther, Wolf Czepluch, Werner Daum, Karl-Friedrich Klein, Hans Poisel, O. Ziemann

Proceedings Volume 4639, (2002) https://doi.org/10.1117/12.481330

KEYWORDS: Phase only filters, Reliability, Signal attenuation, Transmittance, Polymer optical fibers, Multiplexers, Optical testing, Humidity, Climatology, Backscatter

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Proceedings Article | 4 June 2002 Paper

High-performance thin layer chromatography using fiber optics and diode-array detection

Bernd Spangenberg, Karl-Friedrich Klein, J. Mannhardt

Proceedings Volume 4625, (2002) https://doi.org/10.1117/12.469784

KEYWORDS: Fiber optics, Chromatography, Absorption, Head, Spatial resolution, Luminescence, Fiber optics tests, Chemical analysis, Spectral resolution, Diagnostics

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Proceedings Article | 26 March 2002 Paper

Flexible beam guiding in a microsurgical UV laser scalpel

Georg Hillrichs, Hartmut Dietz, Martin Ruetting, Stanislaw Schastak, Peter Wiedemann, Yuji Matsuura, Mitsunobu Miyagi, Karl-Friedrich Klein

Proceedings Volume 4616, (2002) https://doi.org/10.1117/12.463813

KEYWORDS: Ultraviolet radiation, Retina, Laser ablation, Optical fibers, Laser damage threshold, Fiber lasers, Laser applications, Signal attenuation, Eye, Beam guidance systems

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Proceedings Article | 26 March 2002 Paper

Fluorescence in the fiber optic HPTLC-method

Karl-Friedrich Klein, Bernd Spangenberg, Bjoern Arenz

Proceedings Volume 4616, (2002) https://doi.org/10.1117/12.463816

KEYWORDS: Luminescence, Absorption, Fiber optics, Optical fibers, Light scattering, Statistical analysis, Chromatography, Fiber optics tests, Densitometry, Laser induced fluorescence

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Proceedings Article | 4 June 2001 Paper

UV fibers for applications below 200 nm

Karl-Friedrich Klein, Ralf Arndt, G. Hillrichs, Martin Ruetting, M. Veidemanis, R. Dreiskemper, James Clarkin, Gary Nelson

Proceedings Volume 4253, (2001) https://doi.org/10.1117/12.427927

KEYWORDS: Absorption, Optical fibers, Signal attenuation, Silica, Fiber optics, Spectrometers, Nitrogen, Oxygen, Applied sciences, Manufacturing

Read Abstract +

Proceedings Article | 4 June 2001 Paper

New analytical applications with UV fiber bundles

Karl-Friedrich Klein, B. Spangengerg, Hans Meyer, J. Mannhardt, J. Macomber

Proceedings Volume 4253, (2001) https://doi.org/10.1117/12.427919

KEYWORDS: Capillaries, Chromatography, Absorption, Silica, Fiber optics, Spatial resolution, Spectroscopy, Fiber optics tests, Hydrogen, Scanners

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Proceedings Article | 3 May 2000 Paper

Fiber optic systems in the UV region

Michael Huebner, H. Meyer, Karl-Friedrich Klein, G. Hillrichs, Martin Ruetting, M. Veidemanis, Bernd Spangenberg, James Clarkin, Gary Nelson

Proceedings Volume 3911, (2000) https://doi.org/10.1117/12.384918

KEYWORDS: Optical fibers, Fiber optics, Lamps, Spectroscopy, Hydrogen, Silica, Absorption, Silicon, Fiber lasers, Applied sciences

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Proceedings Article | 15 March 2000 Paper

Physical characterization of capillary waveguides

B. Schelle, Peter Dress, Hilmar Franke, Karl-Friedrich Klein, Joachim Slupek

Proceedings Volume 3912, (2000) https://doi.org/10.1117/12.379575

KEYWORDS: Water, Capillaries, Optical fibers, Liquids, Waveguides, Spectrometers, Absorption, Coating, Glasses, Free space

Read Abstract +

Proceedings Article | 21 April 1999 Paper

Improvements in UV transmission of all-silica optical fibers with low OH content

J. Assmus, Joerg Gombert, Karl-Friedrich Klein, James Clarkin, Gary Nelson

Proceedings Volume 3596, (1999) https://doi.org/10.1117/12.346707

KEYWORDS: Optical fibers, Absorption, Hydrogen, Annealing, Silicon, Silica, Color centers, Chlorine, Oxygen, Information operations

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Proceedings Article | 21 April 1999 Paper

Radiation damage of all-silica fibers in the UV region

Joerg Gombert, M. Ziegler, J. Assmus, Karl-Friedrich Klein, Gary Nelson, James Clarkin, H. Pross, J. Kiefer

Proceedings Volume 3596, (1999) https://doi.org/10.1117/12.346709

KEYWORDS: Optical fibers, Annealing, Hydrogen, Absorption, Silica, Chlorine, Ionizing radiation, Information operations, Ultraviolet radiation, Fiber optics

Read Abstract +

Proceedings Article | 9 April 1999 Paper

Advances in fiber optic-based UV resonance Raman spectroscopy techniques for anatomical and physiological investigations

H. Georg Schulze, Christopher Barbosa, L. Shane Greek, Robin Turner, C. Haynes, Karl-Friedrich Klein, Michael Blades

Proceedings Volume 3608, (1999) https://doi.org/10.1117/12.345397

KEYWORDS: Raman spectroscopy, Fiber optics, Ultraviolet radiation, Charge-coupled devices, Optical fibers, Photons, Signal to noise ratio, Deep ultraviolet, CCD image sensors, Sensors

Read Abstract +

Proceedings Article | 5 June 1998 Paper

Influence of fiber drawing on optical UV attenuation of all-silica fibers with undoped core

Valery Khalilov, Karl-Friedrich Klein, Arkady Amosov

Proceedings Volume 3262, (1998) https://doi.org/10.1117/12.309485

KEYWORDS: Chlorine, Silica, Absorption, Cladding, Signal attenuation, Oxygen, Glasses, Silicon, Fluorine, Molecules

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Proceedings Article | 5 June 1998 Paper

Stability and lifetime improvements of UV fibers for new applications

Karl-Friedrich Klein, Stefan Huettel, Ralf Kaminski, Johannes Kirchhof, Stephan Grimm, Gary Nelson

Proceedings Volume 3262, (1998) https://doi.org/10.1117/12.309468

KEYWORDS: Hydrogen, Optical fibers, Silicon, Spectroscopy, Chlorine, Temperature metrology, Silica, Absorption, Sensors, Ultraviolet radiation

Read Abstract +

Proceedings Article | 26 March 1998 Paper

Ultrasensitive detection system for fiber optic-based ultraviolet spectroscopy

Karl-Friedrich Klein, Mathias Belz, Peter Dress, B. Schelle, William Boyle, Kenneth Grattan, Hilmar Franke

Proceedings Volume 3258, (1998) https://doi.org/10.1117/12.304365

KEYWORDS: Absorption, Sensors, Liquids, Water, Signal to noise ratio, Waveguides, Calibration, Fiber optics, Fiber optics sensors, Ultraviolet radiation

Read Abstract +

Proceedings Article | 13 May 1997 Paper

Possibilities and limitations of optical fibers for the transmission of excimer laser radiation

Karl-Friedrich Klein, Georg Hillrichs, Peter Karlitschek, Klaus Mann

Proceedings Volume 2966, (1997) https://doi.org/10.1117/12.274289

KEYWORDS: Optical fibers, Signal attenuation, Absorption, Silica, Excimer lasers, Solids, Laser damage threshold, Cladding, Fiber lasers, Chlorine

Read Abstract +

Proceedings Article | 13 May 1997 Paper

Suppression of solarization effects in optical fibers for 266-nm laser radiation

Peter Karlitschek, Karl-Friedrich Klein, Georg Hillrichs

Proceedings Volume 2966, (1997) https://doi.org/10.1117/12.274251

KEYWORDS: Absorption, Fiber lasers, Ultraviolet radiation, Silica, Optical fibers, Color centers, Excimer lasers, Laser applications, Photons, Spectroscopy

Read Abstract +

Proceedings Article | 2 May 1997 Paper

Development of optical fiber sensor probes for rapid remote in situ spectroscopic measurements of biological samples

H. Georg Schulze, L. Shane Greek, Michael Blades, Alan Bree, Boris Gorzalka, Karl-Friedrich Klein, Robin Turner

Proceedings Volume 2982, (1997) https://doi.org/10.1117/12.273621

KEYWORDS: Raman spectroscopy, Optical fibers, Ultraviolet radiation, Aluminum, Fiber optics, Deep ultraviolet, Spectroscopy, Signal attenuation, Solids, Manufacturing

Read Abstract +

Proceedings Article | 18 April 1997 Paper

Fiber-guided tunable UV-laserlight system around 215 nm

Karl-Friedrich Klein, Stefan Huettel, H. Georg Schulze, L. Shane Greek, Michael Blades, Charles Haynes, Robin Turner

Proceedings Volume 2977, (1997) https://doi.org/10.1117/12.271012

KEYWORDS: Optical fibers, Absorption, Pulsed laser operation, Fiber lasers, Fiber optics, Tunable lasers, Silica, Signal attenuation, Nd:YAG lasers, Laser systems engineering

Read Abstract +

Proceedings Article | 10 December 1996 Paper

Water-quality measurement using fiber optics at wavelengths below 230 nm

Karl-Friedrich Klein, H. Rode, Mathias Belz, William Boyle, Kenneth Grattan

Proceedings Volume 2836, (1996) https://doi.org/10.1117/12.260592

KEYWORDS: Absorption, Fiber optics, Spectroscopy, Sensors, Capillaries, Lamps, Optical fibers, Ultraviolet radiation, Fiber optics sensors, Silica

Read Abstract +

Proceedings Article | 5 April 1996 Paper

Improved UV-fiber for 193-nm excimer laser applications

Peter Karlitzschek, Karl-Friedrich Klein, Georg Hillrichs, Ulrich Grzesik

Proceedings Volume 2677, (1996) https://doi.org/10.1117/12.237556

KEYWORDS: Excimer lasers, Absorption, Optical fibers, Fiber lasers, Silica, Medical laser equipment, Fiber optics, Pyroelectric detectors, Chlorine, Ophthalmology

Read Abstract +

Proceedings Article | 25 February 1993 Paper

Excitation-dependent radiation-induced losses in step-index fibers with undoped core

A. Bernhardt, Karl-Friedrich Klein, Heinz Fabian, Ulrich Grzesik, Henning Henschel, Otmar Koehn, Hans Schmidt

Proceedings Volume 1791, (1993) https://doi.org/10.1117/12.141173

KEYWORDS: Optical fibers, Cladding, Step index fibers, Interfaces, Silica, Multimode fibers, Reliability, Resistance, Refractive index, Neodymium

Read Abstract +

Proceedings Article | 9 February 1993 Paper

Excitation-dependent losses in plastic optical fibers

U. Paar, W. Ritter, Karl-Friedrich Klein

Proceedings Volume 1799, (1993) https://doi.org/10.1117/12.141365

KEYWORDS: Cladding, Signal attenuation, Polymer optical fibers, Optical fibers, Light sources, Fiber characterization, Step index fibers, Polymers, Interfaces, Fiber lasers

Read Abstract +

Proceedings Article | 1 September 1991 Paper

Bundle of tapered fibers for the transmission of high-power excimer laser pulses

Hermine Hitzler, Norbert Leclerc, Christoph Pfleiderer, Juergen Wolfrum, Karl-Otto Greulich, Karl-Friedrich Klein

Proceedings Volume 1503, (1991) https://doi.org/10.1117/12.46947

KEYWORDS: Excimer lasers, Pulsed laser operation, Laser energy, Materials processing, Fiber lasers, Reflection, Quartz, Cladding, Fiber coatings, Coating

Read Abstract +

Proceedings Article | 1 August 1991 Paper

Optical fibers for UV applications

Heinz Fabian, Ulrich Grzesik, K.-H. Woerner, Karl-Friedrich Klein

Proceedings Volume 1513, (1991) https://doi.org/10.1117/12.46020

KEYWORDS: Ultraviolet radiation, Optical fibers, Absorption, Hydrogen, Signal attenuation, Glasses, Photons, Annealing, Oxygen, Silicon

Read Abstract +

Proceedings Article | 1 September 1990 Paper

Influence of F-doped silica cladding on the radiation hardness of SM-fibers with undoped silica core

Heinz Fabian, Karl-Friedrich Klein, Henning Henschel, Otmar Koehn, Hans Schmidt, Peter Lyons, Larry Looney

Proceedings Volume 1314, (1990) https://doi.org/10.1117/12.21981

KEYWORDS: Cladding, Signal attenuation, Silica, Fluorine, Fiber optics, Refractive index, Doping, Fiber characterization, Temperature metrology, Waveguides

Read Abstract +

Showing 5 of 82 publications

Conference Committee Involvement (31)

Specialty Optical Fibres VIII

9 April 2024 | Strasbourg, France

Micro-Structured and Specialty Optical Fibres VII

6 April 2022 | Strasbourg, France

Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXII

22 January 2022 | San Francisco, California, United States

Micro-structured and Specialty Optical Fibres VII

19 April 2021 | Online Only, Czech Republic

Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXI

6 March 2021 | Online Only, California, United States

Micro-Structured and Specialty Optical Fibres VI

6 April 2020 | Online Only, France

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XX

1 February 2020 | San Francisco, California, United States

Micro-structured and Specialty Optical Fibres

3 April 2019 | Prague, Czech Republic

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIX

2 February 2019 | San Francisco, California, United States

Micro-Structured and Specialty Optical Fibres

25 April 2018 | Strasbourg, France

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVIII

27 January 2018 | San Francisco, California, United States

Micro-structured and Specialty Optical Fibres

26 April 2017 | Prague, Czech Republic

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVII

28 January 2017 | San Francisco, California, United States

Micro-Structured and Specialty Optical Fibres

4 April 2016 | Brussels, Belgium

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVI

13 February 2016 | San Francisco, California, United States

Micro-structured and Specialty Optical Fibres

15 April 2015 | Prague, Czech Republic

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XV

7 February 2015 | San Francisco, California, United States

Micro-Structured and Specialty Optical Fibres

14 April 2014 | Brussels, Belgium

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIV

1 February 2014 | San Francisco, California, United States

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIII

2 February 2013 | San Francisco, California, United States

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII

22 January 2012 | San Francisco, California, United States

Optical Fibers, Sensors, and Devices for Biomedical Diagnostics and Treatment XI

22 January 2011 | San Francisco, California, United States

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications X

23 January 2010 | San Francisco, California, United States

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications IX

24 January 2009 | San Jose, California, United States

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications VIII

19 January 2008 | San Jose, California, United States

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications VII

20 January 2007 | San Jose, California, United States

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications VI

21 January 2006 | San Jose, California, United States

Optical Fibers and Sensors for Medical Applications V

22 January 2005 | San Jose, CA, United States

Optical Fibers and Sensors for Medical Applications IV

24 January 2004 | San Jose, CA, United States

Optical Fibers and Sensors for Medical Applications III

25 January 2003 | San Jose, CA, United States

Specialty Fiber Optics and Lasers for Medical Applications

28 January 1998 | San Jose, CA, United States

Showing 5 of 31 Conference Committees

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