Conferences 

Optica Advanced Photonics Congress 2024

Bragg Gratings, Photosensitivity and Poling in Optical Materials and Waveguides (BGPP)

Québec, Canada, 28.07–01.08.2024

Invited Talk:

J. Roths, “Sensing in Extreme High Temperature Environments With Regenerated Fiber Bragg Gratings (RFBGs)”

Contributed Talk:

A. Röhrl, “Ultra-high Temperature Sensor Utilizing an Intrinsic Sapphire Fabry-Pérot Interferometer”

Publications:

A. Roehrl, A. Stadler, F. Buchfellner, S. Zehetmair, J. Roths "Ultra-high Temperature Sensor Utilizing an Intrinsic Sapphire Fabry-Pérot Interferometer," Advanced Photonics Congress in Québec, (Optica Publishing Group 2024), paper BM4A.4; DOI: 10.1364/BGPP.2024.BM4A.4 (2024)

J. Roths, Q.Biana, A. Stadlera, F. Buchfellnera, A. Roehrl "Sensing in Extreme High Temperature Environments with Regenerated Fiber Bragg Gratings," Advanced Photonics Congress in Québec, (Optica Publishing Group 2024), paper BTu2A.1; DOI: 10.1364/BGPP.2024.BTu2A.1 (2024)

Optica Sensing Congress 2023

Optica Sensing Congress 2023

Munich, Germany, 31.07. – 03.08.2023

Invited Talk:

F. Buchfellner, “Intra-spectral temperature-compensated FBG sensors for hydrogen detection and beyond”, in Next Generation Fiber Sensors Session

Publications:

F. Buchfellner, Q. Bian, F. Moos, J. Nicolai, F. Zhang, W. Hu, M. Yang, A. W. Koch, J. Roths, “Intra-spectral temperature-compensated FBG sensors for hydrogen detection and beyond,” Optica Sensing Congress in Munich (Optica Publishing Group, 2023), paper STh3D.2

EWOFS 2023 – European Conference on Optical Fibre Sensors

EWOFS 2023 – European Conference on Optical Fibre Sensors

Mons, Belgium, 23.06. – 26.06.2023

Poster Presentation:

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

Publications: PROCEEDINGS VOLUME 12643

F. Buchfellner, Q. Bian, A. Roehrl, F. Zhang, W. Hu, M. Yang, A. W. Koch, J. Roths, “Simulation of a temperature-compensated palladium-based fiber optic hydrogen sensor and comparison with measurements,” Proc. SPIE 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023), 126430W (23 May 2023); DOI: 10.1117/12.2678227

15th European Turbomachinery Conference organized in collaboration with EVI-GTI

15th European Turbomachinery Conference organized in collaboration with EVI-GTI

Budapest, Hungary, 24.04. – 28.04.2023

Oral Presentation:

A. Stadler, Highly dense total temperature measurement of fast air streams with a 15-point RFBG sensor array

B. Karlsson, High-temperature profile monitoring in the exhaust duct of a 57 MW gas turbine with fiber-optic sensor array

OFS-27 International Conference on Optical Fiber Sensors 2022

OFS-27 International Conference on Optical Fiber Sensors 2022

Alexandria, VA, USA, 29.8. – 02.09.2022

Oral Presentation:

J. Roths, Fiber Optic Smart Casts – Investigation of strain behavior during aluminum casting process with regenerated fiber Bragg grating arrays

F. Buchfellner, Micro-indentation on bovine and human cartilage with phase-shifted fiber Bragg gratings in PM fibers

Poster Presentation:

A. Stadler, Verification of the mechanical integrity of regenerated fiber Bragg gratings (RFBGs) by shaker tests for their use as high-temperature sensors in gas turbines

Publications: Conference Proceedings (ISBN 978-1-957171-14-2)

A. Stadler, F. Buchfellner, A. Zeisberger, M. Jakobi, A. W. Koch, and J. Roths, "Verification of the mechanical integrity of regenerated fiber Bragg gratings (RFBGs) by shaker tests for their use as high-temperature sensors in gas turbines," in 27th International Conference on Optical Fiber Sensors, Technical Digest Series (Optica Publishing Group, 2022), paper W4.33.

Q. Bian, C. Bauer, A. Stadler, F. Buchfellner, M. Jakobi, W. Volk, A. W. Koch, and J. Roths, "Investigation of Strain Behavior during Aluminum Casting Process with Regenerated Fiber Bragg Grating Arrays," in 27th International Conference on Optical Fiber Sensors, Technical Digest Series (Optica Publishing Group, 2022), paper W2.4.

F. Buchfellner, S. Fiedler, M. Danalache, C. Daniel, Q. Bian, B. Trautwein, U. K. Hofmann, and J. Roths, "Micro-Indentation on Bovine and Human Cartilage with Phase-shifted Fiber Bragg Gratings in PM Fibers," in 27th International Conference on Optical Fiber Sensors, Technical Digest Series (Optica Publishing Group, 2022), paper Th1.4.

SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring Conference 2021

SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring Conference 2021

Online, 22.03-26.03.2021

Oral Presentation:

Qiang Bian, Multipoint temperature monitoring based on a regenerated fiber Bragg grating temperature sensor array in copper casting.

Poster Presentation:

Andrea Stadler, Decoupled temperature and strain measurement with regenerated fiber Bragg gratings during an aluminum casting process.

Publication:

Qiang Bian, Constantin Bauer, Andrea Stadler, Martin Jakobi, Alexander W. Koch, Johannes Roths, "Multipoint temperature monitoring based on a regenerated fiber Bragg grating temperature sensor array in copper casting", Proc.SPIE, 11591: p. 115910U. (2021).

Andrea Stadler, Markus Lindner, Qiang Bian, Georg Hamann, Constantin Bauer, Wolfram Volk, Martin Jakobi, Alexander W. Koch, Johannes Roths "Decoupled temperature and strain measurement with regenerated fiber Bragg gratings during an aluminum casting process", Proc.SPIE, 11591: p. 115912D. DOI: (2021).

Gas Turbine Instrumentation Conference 2019

Gas Turbine Instrumentation Conference 2019

Graz, 20.11.-21.10.2019

Oral Presentation:

Franz Dutz, High temperature distribution monitoring in gas turbine exhaust ducts with multi-point fiber-optic sensors.

EWOFS-7 European Workshop on Optical Fibre Sensors

EWOFS-7 European Workshop on Optical Fibre Sensors

Limassol 1.10.-04.10.2019

Poster Presentation:

M. Lindner, Force sensitivity of regenerated fiber Bragg gratings in the temperature range from room temperature to 400 _C
J. Roths, 2D stiffness mapping for localizing osteoarthritic degenerated cartilage by using a fast indentation system based on fiber Bragg gratings

Publication:

Kalahrodi, A.J., G. Marchi, J. Möller, S. Nolte, and J. Roths, “2D stiffness mapping for localizing osteoarthritic degenerated cartilage by using a fast indentation system based on fiber Bragg gratings”, Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors. 111990X, DOI: doi.org/10.1117/12.2539252 (2019)
M. Lindner, D. Bernard, M. Jakobi, A.W. Koch, and J. Roths, “Force sensitivity of regenerated fiber Bragg gratings in the temperature range from room temperature to 400°C”, Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 1119906, DOI: doi.org/10.1117/12.2539376 (2019)

SPIE, Defense and Commercial Sensing 2018

SPIE- Defense and Commercial Sensing

Orlando, 15.04.-19.04.2018

Invited Talk:

Conference 10654: Fiber Optic Sensors and Applications XV

J. Roths, Multipoint high temperature sensing with regenerated fiber Bragg gratings

Publication:

F.J. Dutz, M. Lindner, A. Heinrich, C.G. Seydel, T. Bosselmann, A.W. Koch, and J. Roths, "Multipoint high temperature sensing with regenerated fiber Bragg gratings," Proc. SPIE Vol. 10654, 1065407 (2018)

SPIE, Photonics West 2018

SPIE- Photonics West

San Francisco, 27.01.-01.02.2018

Oral Presentation:

Conference 10496: Optical Elastography and Tissue Biomechanics V

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

Publication:

G. Marchi, O. Canti, V. Baier, W. Micallef, B. Hartmann, P. Alberton, A. Aszodi, H. Clausen-Schaumann, and J. Roths, “Cartilage microindentation using cylindrical and spherical optical fiber indenters with integrated Bragg gratings as force sensors,” Proceedings of SPIE Vol. 10496, 104960Z-2 (2018)

OFS-25: Int. Conference on Optical Fiber Sensors 2017

OFS-25 International Conference on Optical Fiber Sensors

Jeju 24.04.-28.04.2017

Oral Presentation:

J. Roths, Characterization of bovine cartilage by fiber Bragg grating based stress relaxation measurements

Poster Presentation:

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

M. Lindner, Three-dimensional FEM model of FBGs in PANDA fibers with experimentally determined model parameters

Publications: Conference Proceedings

B. Fischer, B. Hopf, M. Lindner, A. W. Koch, and J. Roths, "Verification of a three-dimensional FEM model for FBGs in PANDA fibers by transversal load experiments", Proceedings of SPIE Vol. 10323, 103232B (2017)

M. Lindner, B. Hopf, A. W. Koch, and J. Roths, "Three-dimensional FEM model of FBGs in PANDA fibers with experimentally determined model parameters", Proceedings of SPIE Vol. 10323, 103232A (2017)

V. Baier, G. Marchi, P. Föhr, R. Burgkart, and J. Roths, "Characterization of bovine cartilage by fiber Bragg grating-based stress relaxation measurements", Proceedings of SPIE Vol. 10323, 103230G (2017)

Oelhafen, J., T. Mayr, K. Moutzouris, J. Roths, and K. Drechsler, "Calibration and uncertainty of a fibre optic measurement system for Fresnel reflectometer sensors", Proceedings of SPIE Vol. 10323, 103235O (2017)

EWOFS-2016: 6th European Workshop on Optical Fibre Sensing 2016

EWOFS-2016: European Workshop on Optical Fibre Sensors

Limerick, 31.05.-03.06.2016

Poster Presentation:

B. Hopf, Nonlinear temperature dependence of glue-induced birefringence in polarization maintaining FBG sensors

B. Hopf, Iterative matrix inversion technique for simultaneous strain and temperature sensing in an extended temperature range

F.J. Dutz, Force and temperature characteristics of a fs-laser machined locally micro-structured FBG

Publication:

B. Hopf, A.W. Koch, and J. Roths, “Nonlinear temperature dependence of glue-induced birefringence in polarization maintaining FBG sensors”, Proc. of SPIE 99160M-99160M-4, (2016)

B. Hopf, A.W. Koch, and J. Roths, “Iterative matrix inversion technique for simultaneous strain and temperature sensing in an extended temperature range”, Proc. of SPIE 99160O-99160O-4, (2016)

F.J. Dutz, G. Marchi, V. Stephan, H.P. Huber, and J. Roths, “Force and temperature characteristics of a fs-laser machined locally micro-structured FBG”, Proc. of SPIE 991621-991621-4, (2016)

SPIE Photonics Europe 2016

SPIE- Photonics Europe

Brussels, 04.04.-07.04.2016

Oral Presentation:

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

Publication:

G. Marchi, V. Stephan, F.J. Dutz, H.P. Huber, and J. Roths, “Stress tuneable phase shifts of femtosecond-laser microstructured FBG for indentation measurements of biological tissue: experimental and theoretical investigation”, Proc. of SPIE, 98860P-8 (2016)

OFS-24: Int. Conference on Optical Fiber Sensors 2015

OFS-24: Int. Conference on Optical Fiber Sensors

Curitiba, 29.09.-02.10.2015

Oral Presentation:

L. Polz, Birefringence properties of a polarization maintaining Panda fibre during Bragg grating regeneration

J. Roths, Laser structured fibre Bragg gratings as enhanced force sensors

Publication: Conference Proceedings

Marchi, G., V. Stephan, H. Huber, and J. Roths, "Laser structured fibre Bragg gratings as enhanced force sensors", Proc. of SPIE 9634, 963458-4, (2015)

Polz, L., A. Jarsen, H. Bartelt, and J. Roths, Birefringence properties of a polarization maintaining Panda fibre during Bragg grating regeneration, Proc. of SPIE 9634, 96345Q-96345Q-4, (2015)