Prof. Johannes Roths Profile

Prof. Johannes Roths

Professor & Head of Photonics Lab at Munich Univ of Applied Sciences

SPIE Involvement:

Author

Publications (34)

Proceedings Article | 23 May 2023 Paper

Simulation of a temperature-compensated palladium-based fiber optic hydrogen sensor and comparison with measurements

Fabian Buchfellner, Qiang Bian, Alexander Röhrl, Fan Zhang, Wenbin Hu, Minghong Yang, Alexander Koch, Johannes Roths

Proceedings Volume 12643, 126430W (2023) https://doi.org/10.1117/12.2678227

KEYWORDS: Palladium, Fiber Bragg gratings, Fiber optics sensors, Hydrogen, Solids, Sensors, Temperature metrology, Solubility, Matrices, Fiber optics

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Proceedings Article | 22 March 2021 Presentation + Paper

Multipoint temperature monitoring based on a regenerated fiber Bragg grating temperature sensor array in copper casting

Qiang Bian, Constantin Bauer, Andrea Stadler, Martin Jakobi, Alexander Koch, Johannes Roths

Proceedings Volume 11591, 115910U (2021) https://doi.org/10.1117/12.2588600

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Proceedings Article | 22 March 2021 Poster + Presentation + Paper

Decoupled temperature and strain measurement with regenerated fiber Bragg gratings during an aluminum casting process

Andrea Stadler, Markus Lindner, Qiang Bian, Georg Hamann, Constantin Bauer, Wolfram Volk, Martin Jakobi, Alexander Koch, Johannes Roths

Proceedings Volume 11591, 115912D (2021) https://doi.org/10.1117/12.2588926

KEYWORDS: Aluminum, Temperature metrology, Fiber Bragg gratings, Sensors, Structural health monitoring, Solids, Fiber optics sensors, Capillaries, Buildings, Bridges

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Proceedings Article | 28 August 2019 Paper

2D stiffness mapping for localizing osteoarthritic degenerated cartilage by using a fast indentation system based on fiber Bragg gratings

A. Javadzadeh Kalahrodi, G. Marchi, J. Möller, S. Nolte, J. Roths

Proceedings Volume 11199, 111990X (2019) https://doi.org/10.1117/12.2539252

KEYWORDS: Cartilage, Fiber Bragg gratings, Sensors, Calibration, Silicon, Surgery, Reflection, Head, Applied sciences, Photonics

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Proceedings Article | 28 August 2019 Paper

Force sensitivity of regenerated fiber Bragg gratings in the temperature range from room temperature to 400°C

M. Lindner, D. Bernard, M. Jakobi, A. Koch, J. Roths

Proceedings Volume 11199, 1119906 (2019) https://doi.org/10.1117/12.2539376

KEYWORDS: Fiber Bragg gratings, Solids, Bragg gratings, Sensors, Silica, Aluminum, Applied sciences, Data modeling

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Proceedings Article | 14 May 2018 Paper

Multipoint high temperature sensing with regenerated fiber Bragg gratings

Franz Dutz, Markus Lindner, Andreas Heinrich, Carl Seydel, Thomas Bosselmann, Alexander Koch, Johannes Roths

Proceedings Volume 10654, 1065407 (2018) https://doi.org/10.1117/12.2305300

KEYWORDS: Sensors, Temperature metrology, Calibration, Fiber Bragg gratings, Annealing, Fiber optics sensors

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Proceedings Article | 19 February 2018 Paper

Cartilage microindentation using cylindrical and spherical optical fiber indenters with integrated Bragg gratings as force sensors

G. Marchi, O. Canti, V. Baier, W. Micallef, B. Hartmann, P. Alberton, A. Aszodi, H. Clausen-Schaumann, J. Roths

Proceedings Volume 10496, 104960Z (2018) https://doi.org/10.1117/12.2289493

KEYWORDS: Fiber Bragg gratings, Cartilage, Sensors, Optical fibers, Tissues, Optical biosensors, Elastography

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SPIE Journal Paper | 26 September 2017

Raman microstructural investigation of optical fiber at elevated temperature

Binod Bastola, Bennet Fischer, Johannes Roths, Andreas Ruediger

OE, Vol. 56, Issue 09, 097104, (September 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.9.097104

KEYWORDS: Raman spectroscopy, Glasses, Optical fibers, Annealing, Temperature metrology, Cladding, Thermal optics, Fiber Bragg gratings, Deconvolution, Raman scattering

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Proceedings Article | 27 April 2017 Presentation + Paper

In-situ Raman investigation of optical fiber glass structural changes at high temperature

B. Bastola, B. Fischer, J. Roths, A. Ruediger

Proceedings Volume 10208, 102080L (2017) https://doi.org/10.1117/12.2262993

KEYWORDS: Raman spectroscopy, Glasses, Fiber optics sensors, Optical fibers, High temperature raman spectroscopy, Temperature metrology, Fiber Bragg gratings, Structured optical fibers, Phonons, Integration, Annealing, Raman scattering, Photons, Cladding

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Proceedings Article | 23 April 2017 Paper

Three-dimensional FEM model of FBGs in PANDA fibers with experimentally determined model parameters

Markus Lindner, Barbara Hopf, Alexander Koch, Johannes Roths

Proceedings Volume 10323, 103232A (2017) https://doi.org/10.1117/12.2263261

KEYWORDS: 3D modeling, Fiber Bragg gratings, Finite element methods, Birefringence, Manufacturing, Optical fibers, Refractive index, 3D metrology, Temperature metrology, Cladding

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Proceedings Article | 23 April 2017 Paper

Verification of a three-dimensional FEM model for FBGs in PANDA fibers by transversal load experiments

Bennet Fischer, Barbara Hopf, Markus Lindner, Alexander Koch, Johannes Roths

Proceedings Volume 10323, 103232B (2017) https://doi.org/10.1117/12.2263262

KEYWORDS: 3D modeling, Finite element methods, Fiber Bragg gratings, Optical fibers, 3D metrology, Data modeling, Sensors, Glasses, Computer simulations, Optical simulations

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Proceedings Article | 23 April 2017 Paper

Calibration and uncertainty of a fibre optic measurement system for Fresnel reflectometer sensors

Jonathan Oelhafen, Tobias Mayr, Konstantinos Moutzouris, Johannes Roths, Klaus Drechsler

Proceedings Volume 10323, 103235O (2017) https://doi.org/10.1117/12.2260877

KEYWORDS: Refractive index, Fiber optics, Calibration, Optical testing, Sensors, Reflectometry, Fiber Bragg gratings, Water, Optical fibers, Composites

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Proceedings Article | 23 April 2017 Paper

Characterization of bovine cartilage by fiber Bragg grating-based stress relaxation measurements

V. Baier, G. Marchi, P. Foehr, R. Burgkart, J. Roths

Proceedings Volume 10323, 103230G (2017) https://doi.org/10.1117/12.2263453

KEYWORDS: Cartilage, Sensors, Fiber Bragg gratings, Optical fibers, Tissues, Head, Solids, Collagen, Capillaries, Spatial light modulators

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Proceedings Article | 30 May 2016 Paper

Nonlinear temperature dependence of glue-induced birefringence in polarization maintaining FBG sensors

Barbara Hopf, Alexander Koch, Johannes Roths

Proceedings Volume 9916, 99160M (2016) https://doi.org/10.1117/12.2236839

KEYWORDS: Fiber Bragg gratings, Birefringence, Temperature metrology, Polarization, Glasses, Sensors, Phase modulation, Epoxies, Adhesives, Reflection

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Proceedings Article | 30 May 2016 Paper

Force and temperature characteristics of a fs-laser machined locally micro-structured FBG

Franz Dutz, Gabriele Marchi, Valentin Stephan, Heinz Huber, Johannes Roths

Proceedings Volume 9916, 991621 (2016) https://doi.org/10.1117/12.2236836

KEYWORDS: Optical fibers, Capillaries, Cladding, Sensors, Data modeling, Lawrencium, Reflectivity, Fiber optics

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Proceedings Article | 30 May 2016 Paper

Iterative matrix inversion technique for simultaneous strain and temperature sensing in an extended temperature range

Barbara Hopf, Alexander Koch, Johannes Roths

Proceedings Volume 9916, 99160O (2016) https://doi.org/10.1117/12.2236852

KEYWORDS: Temperature metrology, Fiber optics sensors, Sensors, Fiber Bragg gratings, Cladding, Mechanical sensors, Optical fibers, Phase modulation, Sensing systems, Environmental sensing, Epoxies

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Proceedings Article | 27 April 2016 Paper

Stress tuneable phase shifts of femtosecond-laser microstructured FBG for indentation measurements of biological tissue: experimental and theoretical investigation

Gabriele Marchi, Valentin Stephan, Franz Dutz, Heinz Huber, Johannes Roths

Proceedings Volume 9886, 98860P (2016) https://doi.org/10.1117/12.2225600

KEYWORDS: Fiber Bragg gratings, Phase shifts, Sensors, Structured optical fibers, Endoscopy, Fiber optics sensors, Laser ablation, Diagnostics, Sensors, Structured optical fibers, Capillaries, Optical fibers, Microscopes, Data modeling

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Proceedings Article | 28 September 2015 Paper

Birefringence properties of a polarization maintaining Panda fibre during Bragg grating regeneration

Leonhard Polz, Andreas Jarsen, Hartmut Bartelt, Johannes Roths

Proceedings Volume 9634, 96345Q (2015) https://doi.org/10.1117/12.2194931

KEYWORDS: Birefringence, Fiber Bragg gratings, Annealing, Polarization, Temperature metrology, Phase modulation, Hydrogen, Polarization maintaining fibers, Refractive index, Boron

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Proceedings Article | 28 September 2015 Paper

Laser structured fibre Bragg gratings as enhanced force sensors

G. Marchi, V. Stephan, H. Huber, J. Roths

Proceedings Volume 9634, 963458 (2015) https://doi.org/10.1117/12.2194567

KEYWORDS: Fiber Bragg gratings, Sensors, Data modeling, Capillaries, Objectives, Femtosecond phenomena, Microscopes, Applied sciences, Surgery, Diagnostics

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Proceedings Article | 22 June 2015 Paper

All optical indentation probe for endoscopic diagnosis of ostheoarthritis

G. Marchi, M. Jost, A. Steinkopff, C. Prein, A. Aszodi, H. Clausen-Schaumann, J. Roths

Proceedings Volume 9529, 95291A (2015) https://doi.org/10.1117/12.2184687

KEYWORDS: Fiber Bragg gratings, Sensors, Cartilage, Silicon, Tissues, Fabry–Perot interferometers, Capillaries, Endoscopy, Data modeling, Tissue optics

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Proceedings Article | 2 June 2014 Paper

Glue-induced birefringence in surface-attached FBG strain sensors

Dominik Helminger, Alexej Daitche, Johannes Roths

Proceedings Volume 9157, 91577B (2014) https://doi.org/10.1117/12.2059303

KEYWORDS: Birefringence, Fiber Bragg gratings, Adhesives, Sensors, Temperature metrology, Climatology, Single mode fibers, Fiber optics sensors, Optical fibers, Polarization

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Proceedings Article | 2 June 2014 Paper

Miniaturized total temperature probe based on fibre Bragg gratings

Leonhard Polz, Tasja Berghaus, Markus Klose, Andreas Zeisberger, Hartmut Bartelt, Johannes Roths

Proceedings Volume 9157, 91579F (2014) https://doi.org/10.1117/12.2059473

KEYWORDS: Fiber Bragg gratings, Sensors, Transducers, Spatial resolution, Environmental sensing, Distortion, Temperature metrology, Temperature sensors, Transmission electron microscopy, Fiber optics sensors

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Proceedings Article | 2 June 2014 Paper

Regeneration experiments with fibre Bragg gratings in hydrogen out-diffused fibres

Leonhard Polz, Andreas Dörfler, Hartmut Bartelt, Johannes Roths

Proceedings Volume 9157, 91577F (2014) https://doi.org/10.1117/12.2059552

KEYWORDS: Hydrogen, Fiber Bragg gratings, Diffusion, Reflectivity, Cladding, Optical fibers, Chemical species, Molecules, Glasses, Ultraviolet radiation

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Proceedings Article | 20 May 2013 Paper

Two regimes of grating regeneration in hydrogen loaded photosensitive fiber

Leonhard Polz, Quang Nguyen, Hartmut Bartelt, Johannes Roths

Proceedings Volume 8794, 879420 (2013) https://doi.org/10.1117/12.2025857

KEYWORDS: Fiber Bragg gratings, Hydrogen, Cladding, Annealing, Temperature metrology, Refractive index, Modulation, Reflectivity, Germanium, Phosphorus

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Proceedings Article | 20 May 2013 Paper

FBG inscription in non-hydrogenated SMF28 fiber with a ns Q-switched Nd:VO4 laser at 213 nm

Bianca Berrang, Leonhard Polz, Rolf Kuttler, Jürgen Bartschke, Johannes Roths

Proceedings Volume 8794, 87941Z (2013) https://doi.org/10.1117/12.2025845

KEYWORDS: Fiber Bragg gratings, Modulation, Refractive index, Fiber lasers, Laser sources, Q switched lasers, Optical fibers, Photonics, Light sources, Absorption

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Proceedings Article | 7 November 2012 Paper

Comparison of strain sensitivities of free and attached FBG strain sensors

Johannes Roths, Laura Aulbach, Andre Wilfert, Peter Kratzer, Florian Jülich, Rolf Kuttler

Proceedings Volume 8421, 8421BM (2012) https://doi.org/10.1117/12.975254

KEYWORDS: Optical fibers, Fiber Bragg gratings, Sensors, Calibration, Fiber optics sensors, Reflection, Fiber optics, Coating, Doping, Photonics

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Proceedings Article | 9 May 2012 Paper

Polarization dependence of the strain sensitivity of fiber Bragg gratings inscribed in highly birefringent optical fibers

Paul Singh, Florian Jülich, Johannes Roths

Proceedings Volume 8439, 84391S (2012) https://doi.org/10.1117/12.922733

KEYWORDS: Fiber Bragg gratings, Polarization, Sensors, Birefringence, Single mode fibers, Calibration, Reflection, Optical fibers, Temperature sensors, Beam splitters

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Proceedings Article | 24 August 2011 Paper

Preliminary results of an experimental verification of shear strain influence on fibre Bragg grating reflection spectra

A. Heßke, M. Müller, T. Buck, A. Koch, F. Jülich, J. Roths

Proceedings Volume 8173, 81731Y (2011) https://doi.org/10.1117/12.897911

KEYWORDS: Fiber Bragg gratings, Polarization, Sensors, Optical filters, Birefringence, Glasses, Refractive index, Polishing, Photonics, Light sources

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Proceedings Article | 9 September 2010 Paper

Strain calibration of optical FBG-based strain sensors

Johannes Roths, Andre Wilfert, Peter Kratzer, Florian Jülich, Rolf Kuttler

Proceedings Volume 7653, 76530F (2010) https://doi.org/10.1117/12.866428

KEYWORDS: Sensors, Calibration, Fiber Bragg gratings, Optical calibration, Optical fibers, Manufacturing, Sensor calibration, Statistical analysis, Optical components, Reflection

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Proceedings Article | 14 May 2010 Paper

Comparison of transverse load sensitivities of fibre Bragg gratings in different types of optical fibres

Florian Jülich, Johannes Roths

Proceedings Volume 7726, 77261N (2010) https://doi.org/10.1117/12.854019

KEYWORDS: Fiber Bragg gratings, Optical fibers, Sensors, Optical components, Transducers, Cladding, Refractive index, Chemical elements, Structured optical fibers, Reflectivity

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Proceedings Article | 7 April 2010 Paper

High-precision thermal strain measurements using surface-mounted fiber Bragg grating sensors

Uwe Mueller, Jan Both, Johannes Roths, Horst Baier

Proceedings Volume 7648, 764807 (2010) https://doi.org/10.1117/12.847535

KEYWORDS: Fiber Bragg gratings, Zerodur, Adhesives, Temperature metrology, Optical fibers, Thermal optics, Sensors, Carbon, Coating, Thermal modeling

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Proceedings Article | 26 April 2008 Paper

Determination of strain sensitivity of free fiber Bragg gratings

Johannes Roths, Florian Jülich

Proceedings Volume 7003, 700308 (2008) https://doi.org/10.1117/12.781426

KEYWORDS: Fiber Bragg gratings, Structured optical fibers, Refractive index, Optical fibers, Sensors, Single mode fibers, Standards development, Cladding, Telecommunications, Temperature metrology

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Proceedings Article | 17 September 1997 Paper

New modulation technique for unambiguous measurements of phase changes in diode laser interferometers

Igor Koltchanov, Klaus Petermann, Johannes Roths

Proceedings Volume 3098, (1997) https://doi.org/10.1117/12.281176

KEYWORDS: Modulation, Interferometers, Phase shift keying, Semiconductor lasers, Signal processing, Phase measurement, Electronic filtering, Photodetectors, Signal generators, Interferometry

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Proceedings Article | 17 September 1997 Paper

Interferometric displacement measurements performed with a self-mixing microinterferometer

Johannes Roths, Martin Breinbauer, Bernhard Hilber, Christoph Gerz, Igor Koltchanov, Klaus Petermann

Proceedings Volume 3098, (1997) https://doi.org/10.1117/12.281186

KEYWORDS: Semiconductor lasers, Modulation, Interferometers, Interferometry, Mirrors, Signal detection, Glasses, Sensors, Signal to noise ratio, Diodes

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Showing 5 of 34 publications

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