Dr. Kristian Nielsen Profile

Dr. Kristian Nielsen

Development Engineer at DTU Electro

SPIE Involvement:

Author

Publications (23)

Proceedings Article | 28 August 2019 Paper

Utilising thermal annealing for multiplexing and sensitivity enhancement of polymer optical fibre sensors

A. Pospori, C. A. Marques, G. Sagias, H. Lamela-Rivera, D. Sáez-Rodríguezd, K. Nielsen, O. Bang, D. Webb

Proceedings Volume 11199, 111993E (2019) https://doi.org/10.1117/12.2541767

KEYWORDS: Annealing, Sensors, Polymers, Polymer optical fibers, Multiplexing, Optical fibers, Bragg gratings, Polymeric sensors, Humidity, Polymethylmethacrylate

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Proceedings Article | 16 May 2017 Paper

Bandpass transmission filters based on phase shifted fiber Bragg gratings in microstructured polymer optical fibers

Beatriz Ortega, Rui Min, David Sáez-Rodríguez, Yang Mi, Kristian Nielsen, Ole Bang

Proceedings Volume 10232, 1023209 (2017) https://doi.org/10.1117/12.2268281

KEYWORDS: Fiber Bragg gratings, Polymer optical fibers, Optical filters, Polymers, Optical fibers, Bandpass filters, Phase shifts, Telecommunications, Sensors, Fabrication, Temperature metrology

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Proceedings Article | 23 April 2017 Paper

Simultaneous measurement of temperature and humidity with microstructured polymer optical fiber Bragg gratings

Getinet Woyessa, Jens Kristian Mølgaard Pedersen, Andrea Fasano, Kristian Nielsen, Christos Markos, Henrik Koblitz Rasmussen, Ole Bang

Proceedings Volume 10323, 103234T (2017) https://doi.org/10.1117/12.2265884

KEYWORDS: Sensors, Fiber Bragg gratings, Humidity, Temperature metrology, Polymer optical fibers, Polymers, Polymethylmethacrylate, Calibration, Phase only filters, Cladding

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Proceedings Article | 23 April 2017 Paper

Effects of pre-strain on the intrinsic pressure sensitivity of polymer optical fiber Bragg gratings

Jens Kristian Mølgaard Pedersen, Getinet Woyessa, Kristian Nielsen, Ole Bang

Proceedings Volume 10323, 103234U (2017) https://doi.org/10.1117/12.2265885

KEYWORDS: Polymer optical fibers, Fiber Bragg gratings, Fiber optics sensors, Photonic crystal fibers, Sensors, Adhesives, Photonics, Optical fibers, Silica, Polymers, Fabrication, Image resolution, Aluminum

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Proceedings Article | 30 May 2016 Paper

Sensitivity enhancement using annealed polymer optical-fibre-based sensors for pressure sensing applications

A. Pospori, C. Marques, D. Sáez-Rodríguez, K. Nielsen, O. Bang, D. Webb

Proceedings Volume 9916, 99160E (2016) https://doi.org/10.1117/12.2236877

KEYWORDS: Polymeric sensors, Polymers, Sensors, Annealing, Fiber Bragg gratings, Mechanical sensors, Multiplexing, Optical fibers, Liquids, Humidity, Polymethylmethacrylate

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Proceedings Article | 30 May 2016 Paper

3D printed sensing patches with embedded polymer optical fibre Bragg gratings

Michal Zubel, Kate Sugden, D. Saez-Rodriguez, K. Nielsen, O. Bang

Proceedings Volume 9916, 99162E (2016) https://doi.org/10.1117/12.2237495

KEYWORDS: Fiber Bragg gratings, Polymers, Optical fibers, 3D printing, 3D surface sensing, Additive manufacturing, Sensors, Temperature sensors, Polymer optical fibers, Phase only filters, Fused deposition modeling

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Proceedings Article | 27 April 2016 Paper

Embedding silica and polymer fibre Bragg gratings (FBG) in plastic 3D-printed sensing patches

Michal Zubel, Kate Sugden, David Webb, David Sáez-Rodríguez, Kristian Nielsen, Ole Bang

Proceedings Volume 9886, 98860N (2016) https://doi.org/10.1117/12.2228753

KEYWORDS: Fiber Bragg gratings, Silica, Polymers, Sensors, Fused deposition modeling, 3D printing, Printing, Structured optical fibers, 3D surface sensing, Phase only filters

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Proceedings Article | 27 April 2016 Paper

Fuel level sensor based on polymer optical fiber Bragg gratings for aircraft applications

C. Marques, A. Pospori, D. Sáez-Rodríguez, K. Nielsen, O. Bang, D. Webb

Proceedings Volume 9886, 98860W (2016) https://doi.org/10.1117/12.2225918

KEYWORDS: Sensors, Polymer optical fibers, Liquids, Fiber Bragg gratings, Polyurethane, Polymethylmethacrylate, Optical fibers, Silicon, Reflectivity, Safety

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Proceedings Article | 27 April 2016 Paper

Annealing effects on strain and stress sensitivity of polymer optical fibre based sensors

A. Pospori, C. Marques, M. Zubel, D. Sáez-Rodríguez, K. Nielsen, O. Bang, D. Webb

Proceedings Volume 9886, 98860V (2016) https://doi.org/10.1117/12.2227473

KEYWORDS: Annealing, Sensors, Optical fibers, Polymers, Fiber Bragg gratings, Polymethylmethacrylate

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Proceedings Article | 27 April 2016 Paper

Creation of a microstructured polymer optical fiber with UV Bragg grating inscription for the detection of extensions at temperatures up to 125°C

Andrea Fasano, Getinet Woyessa, Pavol Stajanca, Christos Markos, Alessio Stefani, Kristian Nielsen, Henrik Rasmussen, Katerina Krebber, Ole Bang

Proceedings Volume 9886, 988619 (2016) https://doi.org/10.1117/12.2227843

KEYWORDS: Fiber Bragg gratings, Polymer optical fibers, Polymers, Ultraviolet radiation, Optical fibers, Sensors, Optics manufacturing, Polymeric sensors, Photonics, Temperature metrology, Structured optical fibers, Resistance, Fiber lasers

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Proceedings Article | 28 September 2015 Paper

Long term strain behavior of PMMA-based polymer optical fibers

Ivan-Lazar Bundalo, Kristian Nielsen, Getinet Woyessa, Ole Bang

Proceedings Volume 9634, 96347Y (2015) https://doi.org/10.1117/12.2195267

KEYWORDS: Fiber Bragg gratings, Polymers, Polymer optical fibers, Sensors, Polymethylmethacrylate, Silica, Polymeric sensors, Humidity, Optical fibers, Fiber optics sensors

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Proceedings Article | 28 September 2015 Paper

Humidity insensitive step-index polymer optical fibre Bragg grating sensors

G. Woyessa, A. Fasano, A. Stefani, C. Markos, K. Nielsen, H. Rasmussen, O. Bang

Proceedings Volume 9634, 96342L (2015) https://doi.org/10.1117/12.2194963

KEYWORDS: Polymers, Fiber Bragg gratings, Optical fibers, Humidity, Sensors, Glasses, Polymeric sensors, Fiber optics sensors, Polymethylmethacrylate, Cladding

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Proceedings Article | 28 September 2015 Paper

Compound parabolic concentrator optical fiber tip for FRET-based fluorescent sensors

Hafeez Ul Hassan, Kristian Nielsen, Soren Aasmul, Ole Bang

Proceedings Volume 9634, 96346I (2015) https://doi.org/10.1117/12.2192508

KEYWORDS: Compound parabolic concentrators, Sensors, Luminescence, Optical fibers, Fluorescence resonance energy transfer, Zemax, Chemistry, Fiber optics sensors, Fluorescence spectroscopy, Multimode fibers

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Proceedings Article | 28 September 2015 Paper

Fiber optic liquid level monitoring system using microstructured polymer fiber Bragg grating array sensors: performance analysis

C. Marques, A. Pospori, D. Sáez-Rodríguez, K. Nielsen, O. Bang, D. Webb

Proceedings Volume 9634, 96345V (2015) https://doi.org/10.1117/12.2193898

KEYWORDS: Sensors, Liquids, Fiber Bragg gratings, Optical fibers, Sensor performance, Polymer optical fibers, Temperature metrology, Polymers, Silicon, Fiber optics

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Proceedings Article | 2 May 2014 Paper

Increase of the photosensitivity of undoped poly(methylmethacrylate) under UV radiation at 325 nm

D. Sáez-Rodríguez, K. Nielsen, O. Bang, D. Webb

Proceedings Volume 9128, 91280P (2014) https://doi.org/10.1117/12.2054297

KEYWORDS: Polymethylmethacrylate, Fiber Bragg gratings, Ultraviolet radiation, Polymers, Reflectivity, Optical fibers, Cladding, Helium cadmium lasers, Chemical reactions, Optical components

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Proceedings Article | 2 May 2014 Paper

PMMA mPOF Bragg gratings written in less than 10 min

I.-L. Bundalo, K. Nielsen, C. Markos, O. Bang

Proceedings Volume 9128, 91280O (2014) https://doi.org/10.1117/12.2054304

KEYWORDS: Fiber Bragg gratings, Polymethylmethacrylate, Polymers, Silica, Polymer optical fibers, Fiber lasers, Ocean optics, Spectroscopy, Ultraviolet radiation, Reflectivity

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Proceedings Article | 20 May 2013 Paper

Connectorisation of fibre Bragg grating sensors recorded in microstructured polymer optical fibre

A. Abang, D. Saez-Rodriguez, K. Nielsen, O. Bang, D. Webb

Proceedings Volume 8794, 87943Q (2013) https://doi.org/10.1117/12.2026796

KEYWORDS: Connectors, Polishing, Sensors, Phase only filters, Polymers, Fiber Bragg gratings, Ultraviolet radiation, Silica, Polymeric sensors, Optical fibers

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Proceedings Article | 18 May 2011 Paper

870nm Bragg grating in single mode TOPAS microstructured polymer optical fibre

Wu Yuan, David Webb, Kyriacos Kalli, Kristian Nielsen, Alessio Stefani, Henrik Rasmussen, Ole Bang

Proceedings Volume 7753, 77538X (2011) https://doi.org/10.1117/12.884986

KEYWORDS: Fiber Bragg gratings, Polymethylmethacrylate, Polymers, Optical fibers, Polymer optical fibers, Temperature metrology, Photonics, Helium cadmium lasers, Silica, Biosensing

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Proceedings Article | 17 May 2011 Paper

Sensing characteristics of birefringent microstructured polymer optical fiber

Marcin Szczurowski, Orlando Frazão, J. Baptista, Kristian Nielsen, Ole Bang, Wacław Urbańczyk

Proceedings Volume 7753, 77533Z (2011) https://doi.org/10.1117/12.885833

KEYWORDS: Birefringence, Polymer optical fibers, Polarimetry, Temperature metrology, Cladding, Polarization, Visible radiation, Phase shifts, Polymers, Fiber optics sensors

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Proceedings Article | 11 May 2011 Paper

Polymer PCF Bragg grating sensors based on poly(methyl methacrylate) and TOPAS cyclic olefin copolymer

Ian. Johnson, David Webb, Kyriacos Kalli, Wu Yuan, Alessio Stefani, Kristian Nielsen, Henrik Rasmussen, Ole Bang

Proceedings Volume 8073, 80732V (2011) https://doi.org/10.1117/12.890090

KEYWORDS: Sensors, Fiber Bragg gratings, Polymethylmethacrylate, Polymers, Phase only filters, Wavelength division multiplexing, Polymeric sensors, Manufacturing, Annealing, Signal attenuation

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Proceedings Article | 17 June 2009 Paper

Measurement of chromatic dispersion of microstructured polymer fibers by white-light spectral interferometry

P. Hlubina, D. Ciprian, M. Frosz, K. Nielsen

Proceedings Volume 7389, 73890J (2009) https://doi.org/10.1117/12.824543

KEYWORDS: Dispersion, Optical fibers, Refractive index, Silica, Polymethylmethacrylate, Glasses, Interferometry, Mach-Zehnder interferometers, Interferometers, Phase only filters

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Proceedings Article | 20 May 2009 Paper

Dispersion-engineered and highly nonlinear microstructured polymer optical fibres

Michael Frosz, Kristian Nielsen, Petr Hlubina, Alessio Stefani, Ole Bang

Proceedings Volume 7357, 735705 (2009) https://doi.org/10.1117/12.820640

KEYWORDS: Polymethylmethacrylate, Dispersion, Doping, Polymers, Silica, Refractive index, Optical fibers, Waveguides, Optical microscopes, Solids

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Proceedings Article | 11 November 2005 Paper

Raman spectroscopy using photonic crystal fibers

Karsten Rottwitt, Kristian Nielsen, Jørn Povlsen, Grigoriy Emiliyanov, Theis Hansen, Jesper Jensen

Proceedings Volume 6005, 60050G (2005) https://doi.org/10.1117/12.631181

KEYWORDS: Raman spectroscopy, Light wave propagation, Sensors, Light scattering, Raman scattering, Photonic crystal fibers, Silica, Structured optical fibers, Geometrical optics, Statistical analysis

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Showing 5 of 23 publications

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