Prof. Thomas Geernaert Profile

Prof. Thomas Geernaert

Professor at Vrije Univ Brussel

SPIE Involvement:

Author

Publications (39)

Proceedings Article | 17 April 2020 Presentation + Paper

Selective liquid filling of photonic crystal fibers using two-photon polymerization lithography without post-exposure development

Olga Rusyakina, Tigran Baghdasaryan, Pawel Mergo, Krzysztof Poturaj, Hugo Thienpont, Francis Berghmans, Thomas Geernaert

Proc. SPIE. 11355, Micro-Structured and Specialty Optical Fibres VI

KEYWORDS: Lithography, Microscopes, Photonic crystal fibers, Two photon polymerization, Polymers, Capillaries, Printing, Photoresist materials, Photoresist developing, Liquids

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Proceedings Article | 14 April 2020 Presentation + Paper

Phase-shifted Bragg grating inscription in photonic crystal fibers by UV phase mask beam stop technique

Olga Rusyakina, Maria Konstantaki, Stavros Pissadakis, Pawel Mergo, Mariusz Makara, Tigran Baghdasaryan, Hugo Thienpont, Francis Berghmans, Thomas Geernaert

Proc. SPIE. 11355, Micro-Structured and Specialty Optical Fibres VI

KEYWORDS: Optical fibers, Photonic crystal fibers, Bragg gratings, Fiber Bragg gratings, Cladding, Ultraviolet radiation, Germanium, Doping, Single mode fibers, Phase shifts

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Proceedings Article | 1 April 2020 Presentation + Paper

Barely visible impact damage detection and location on composite materials by surface-mounted and embedded aerospace-compatible optical fibre Bragg grating sensors

Sidney Goossens, Thomas Geernaert, Zahra Sharif Khodaei, Evangelos Karachalios, Diego Saenz-Castillo, Francis Berghmans

Proc. SPIE. 11354, Optical Sensing and Detection VI

KEYWORDS: Optical fibers, Aerospace engineering, Bragg gratings, Fiber Bragg gratings, Sensors, Composites, Inspection, Structural health monitoring, Damage detection

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Proceedings Article | 1 April 2020 Presentation + Paper

Fabrication and characterization of step-index biocompatible and biodegradable polyesters based optical fiber

Agnieszka Gierej, Adam Filipkowski, Dariusz Pysz, Ryszard Buczyński, Maxime Vagenende, Sandra Van Vlierberghe, Peter Dubruel, Hugo Thienpont, Thomas Geernaert, Francis Berghmans

Proc. SPIE. 11355, Micro-Structured and Specialty Optical Fibres VI

KEYWORDS: Optical fibers, Refractive index, Photodynamic therapy, Biomedical optics, Biocompatible materials, Cladding, Signal attenuation, Polymers, Polymer optical fibers, Optics manufacturing

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Proceedings Article | 28 August 2019 Paper

Offshore field validation of a FBG based pressure/temperature sensor during a wireline intervention

Ji-Ying Huang, Jan Van Roosbroeck, Johan Vlekken, Bram Van Hoe, Geir Kaada, Morten Talgø, Anders Leirvik, Thomas Geernaert, Francis Berghmans, Christophe Caucheteur, Eric Lindner

Proc. SPIE. 11199, Seventh European Workshop on Optical Fibre Sensors

KEYWORDS: Optical fibers, Femtosecond phenomena, Fiber Bragg gratings, Sensors, Quartz, Structured optical fibers, Fiber optics sensors, Photonics, Sensing systems, Temperature metrology

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Proceedings Article | 15 April 2019 Presentation + Paper

Towards poly(D,L-lactic acid)-based biodegradable and biocompatible polymer optical fiber

Agnieszka Gierej, Maxime Vagenende, Adam Filipkowski, Bartlomiej Siwicki, Ryszard Buczynski, Hugo Thienpont, Sandra Van Vlierberghe, Thomas Geernaert, Peter Dubruel, Francis Berghmans

Proc. SPIE. 11029, Micro-structured and Specialty Optical Fibres VI

KEYWORDS: Optical fibers, Refractive index, Photodynamic therapy, Signal attenuation, Polymers, Polymer optical fibers, In vitro testing

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Proceedings Article | 14 May 2018 Presentation + Paper

Packaged FBG based optical fiber sensor for simultaneous pressure and temperature monitoring

Ji-Ying Huang, Jan Van Roosbroeck, Johan Vlekken, Eric Daerden, Antonio Bueno Martinez, Thomas Geernaert, Francis Berghmans, Bram Van Hoe, Eric Lindner, Christophe Caucheteur

Proc. SPIE. 10654, Fiber Optic Sensors and Applications XV

KEYWORDS: Packaging, Fiber Bragg gratings, Sensors, Calibration, Structured optical fibers, Fiber optics sensors, Photonics, Temperature metrology

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Proceedings Article | 9 May 2018 Presentation + Paper

Micro-structured fiber Bragg grating based pressure sensors in a downhole-like hydrogen rich environment

Ji-Ying Huang, Jan Van Roosbroeck, Johan Vlekken, Damien Kinet, Antonio Bueno Martinez, Thomas Geernaert, Francis Berghmans, Bram Van Hoe, Eric Lindner, Christophe Caucheteur

Proc. SPIE. 10680, Optical Sensing and Detection V

KEYWORDS: Refractive index, Fiber Bragg gratings, Sensors, Hydrogen, Diffusion, Nitrogen

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Proceedings Article | 23 April 2017 Paper

Fibre optic sensor based measurements of flow-induced vibration in a liquid metal cooled nuclear reactor set-up

B. De Pauw, S. Vanlanduit, K. Van Tichelen, T. Geernaert, H. Thienpont, F. Berghmans

Proc. SPIE. 10323, 25th International Conference on Optical Fiber Sensors

KEYWORDS: Optical fibers, Safety, Fiber Bragg gratings, Sensors, Metals, Fiber optics sensors, Optical testing, Vibrometry, Photonics, Liquids

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Proceedings Article | 23 April 2017 Paper

Fiber Bragg grating sensors written by femtosecond laser pulses in micro-structured fiber for downhole pressure monitoring

J.-Y. Huang, J. Van Roosbroeck, A. Bueno Martinez, T. Geernaert, F. Berghmans, C. Caucheteur, B. Van Hoe, E. Lindner, J. Vlekken

Proc. SPIE. 10323, 25th International Conference on Optical Fiber Sensors

KEYWORDS: Optical fibers, Femtosecond phenomena, Fiber Bragg gratings, Sensors, Calibration, Annealing, Reflectivity, Structured optical fibers, Fiber optics sensors, Temperature metrology

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Proceedings Article | 23 April 2017 Paper

Dynamic 3D strain measurements with embedded micro-structured optical fiber Bragg grating sensors during impact on a CFRP coupon

Sidney Goossens, Thomas Geernaert, Ben De Pauw, Alfredo Lamberti, Steve Vanlanduit, Geert Luyckx, Gabriele Chiesura, Hugo Thienpont, Francis Berghmans

Proc. SPIE. 10323, 25th International Conference on Optical Fiber Sensors

KEYWORDS: Carbon, Optical fibers, Aerospace engineering, Fiber Bragg gratings, Sensors, Calibration, Composites, Structured optical fibers, Fiber optics sensors, 3D metrology

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Proceedings Article | 23 April 2017 Paper

Mechanical strain-amplifying transducer for fiber Bragg grating sensors with applications in structural health monitoring

Urszula Nawrot, Thomas Geernaert, Ben De Pauw, Dimitrios Anastasopoulos, Edwin Reynders, Guido De Roeck, Francis Berghmans

Proc. SPIE. 10323, 25th International Conference on Optical Fiber Sensors

KEYWORDS: Optical fibers, Fiber Bragg gratings, Sensors, 3D modeling, Transducers, Civil engineering, Structural health monitoring, Spatial resolution, Adhesives, Temperature metrology

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Proceedings Article | 29 April 2016 Paper

Inverse Abel transform algorithms to determine the radial profile of the photoelastic coefficient of glass optical fibers

Sophie Acheroy, Patrick Merken, Thomas Geernaert, Heidi Ottevaere, Hugo Thienpont, Francis Berghmans

Proc. SPIE. 9899, Optical Sensing and Detection IV

KEYWORDS: Multimode fibers, Optical fibers, Photoelasticity, Photoelasticity, Silica, Birefringence, Cladding, Sensors, Glasses, Fiber optics sensors, Telecommunications, Algorithm development, Fiber characterization, Fourier theory, Algorithms

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Proceedings Article | 27 April 2016 Paper

Determination of the radial profile of the photoelastic coefficient of polymer optical fibers

Sophie Acheroy, Patrick Merken, Thomas Geernaert, Heidi Ottevaere, Hugo Thienpont, Francis Berghmans

Proc. SPIE. 9886, Micro-Structured and Specialty Optical Fibres IV

KEYWORDS: Multimode fibers, Optical fibers, Microscopes, Photoelasticity, Polymethylmethacrylate, Polymers, Fiber optics sensors, Polymer optical fibers, Fiber characterization, Fourier theory, Algorithms

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Proceedings Article | 27 April 2016 Paper

A numerical study on the importance of non-uniform index modification during femtosecond grating inscription in microstructured optical fibers

Tigran Baghdasaryan, Thomas Geernaert, Hugo Thienpont, Francis Berghmans

Proc. SPIE. 9886, Micro-Structured and Specialty Optical Fibres IV

KEYWORDS: Step index fibers, Refractive index, Photonic crystal fibers, Femtosecond phenomena, Modulation, Fiber Bragg gratings, Cladding, Reflectivity, Structured optical fibers, Nonlinear optics, Laser damage threshold

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Proceedings Article | 16 March 2015 Paper

The role of highly non-linear index change mechanism during femtosecond grating writing in microstructured optical fibers

Tigran Baghdasaryan, Thomas Geernaert, Hugo Thienpont, Francis Berghmans

Proc. SPIE. 9359, Optical Components and Materials XII

KEYWORDS: Step index fibers, Refractive index, Femtosecond phenomena, Modulation, Silica, Fiber Bragg gratings, Cladding, Structured optical fibers, Micro optical fluidics, Absorption

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Proceedings Article | 16 March 2015 Paper

Opportunities for designing microstructured optical fibers for efficient femtosecond laser grating inscription

Tigran Baghdasaryan, Thomas Geernaert, Hugo Thienpont, Francis Berghmans

Proc. SPIE. 9359, Optical Components and Materials XII

KEYWORDS: Refractive index, Optical design, Femtosecond phenomena, Data modeling, Fiber Bragg gratings, Cladding, Structured optical fibers, Beam propagation method, Micro optical fluidics, Absorption

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Proceedings Article | 17 September 2014 Paper

Internal strain monitoring in composite materials with embedded photonic crystal fiber Bragg gratings

Thomas Geernaert, Sanne Sulejmani, Camille Sonnenfeld, Karima Chah, Geert Luyckx, Nicolas Lammens, Eli Voet, Martin Becker, Hugo Thienpont, Francis Berghmans

Proc. SPIE. 9226, Nanophotonics and Macrophotonics for Space Environments VIII

KEYWORDS: Optical fibers, Photonic crystal fibers, Fiber Bragg gratings, Sensors, Composites, Fiber optics sensors, Structural health monitoring, Finite element methods, Adhesives, Temperature metrology

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Proceedings Article | 2 June 2014 Paper

Signal-to-noise ratio evaluation with draw tower fibre Bragg gratings (DTGs) for dynamic strain sensing at elevated temperatures and corrosive environment

B. De Pauw, A. Lamberti, S. Vanlanduit, K. Van Tichelen, T. Geernaert, F. Berghmans

Proc. SPIE. 9157, 23rd International Conference on Optical Fibre Sensors

KEYWORDS: Signal to noise ratio, Detection and tracking algorithms, Fiber Bragg gratings, Sensors, Metals, Optical coatings, Integrated optics, Adhesives, Environmental sensing, Liquids

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Proceedings Article | 2 June 2014 Paper

Microstructured optical fiber Bragg grating-based strain and temperature sensing in the concrete buffer of the Belgian supercontainer concept

Thomas Geernaert, Sanne Sulejmani, Camille Sonnenfeld, Geert Luyckx, Karima Chah, Lou Areias, Pawel Mergo, Waclaw Urbanczyk, Philippe Van Marcke, Erik Coppens, Hugo Thienpont, Francis Berghmans

Proc. SPIE. 9157, 23rd International Conference on Optical Fibre Sensors

KEYWORDS: Carbon, Optical fibers, Fiber Bragg gratings, Sensors, Composites, Structured optical fibers, Fiber optics sensors, Optical testing, Micro optical fluidics, Temperature metrology

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Proceedings Article | 2 June 2014 Paper

Microstructured optical fiber Bragg grating-based shear stress sensing in adhesive bonds

Sanne Sulejmani, Camille Sonnenfeld, Thomas Geernaert, Geert Luyckx, Danny Van Hemelrijck, Pawel Mergo, Krzysztof Skorupski, Waclaw Urbanczyk, Karima Chah, Hugo Thienpont, Francis Berghmans

Proc. SPIE. 9157, 23rd International Conference on Optical Fibre Sensors

KEYWORDS: Birefringence, Fiber Bragg gratings, Cladding, Sensors, Structured optical fibers, Structural health monitoring, Finite element methods, Adhesives, Mechanical sensors, Micro optical fluidics

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Proceedings Article | 15 May 2014 Paper

On a possible method to measure the radial profile of the photoelastic constant in step-index optical fiber

Sophie Acheroy, Patrick Merken, Thomas Geernaert, Heidi Ottevaere, Hugo Thienpont, Francis Berghmans

Proc. SPIE. 9141, Optical Sensing and Detection III

KEYWORDS: Multimode fibers, Optical fibers, Microscopes, Refractive index, Photoelasticity, Silica, Birefringence, Cladding, Glasses, Structured optical fibers

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Proceedings Article | 15 May 2014 Paper

Reflective polarimetric vibration sensor based on temperature-independent FBG in HiBi microstructured optical fiber

Karima Chah, Christophe Caucheteur, Patrice Mégret, Sanne Sulejmani, Thomas Geernaert, Hugo Thienpont, Francis Berghmans, Marc Wuilpart

Proc. SPIE. 9141, Optical Sensing and Detection III

KEYWORDS: Polarization, Birefringence, Fiber Bragg gratings, Sensors, Reflectivity, Structured optical fibers, Polarimetry, Transducers, Micro optical fluidics, Temperature metrology

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Fiber optic sensors outperform traditional sensor technologies in fields such as structural health monitoring, vibration and seismic activity monitoring, intrusion detection, and many other applications. Their key advantages include electromagnetic interference immunity, lightweight, small size, multiplexing capabilities, low power consumption, corrosion and high temperature resistance. To meet the demand of more and more challenging optical sensors a new generation of optical fibers, the so-called microstructured optical fibers (MOFs), has appeared. These fibers are composed of a structure of holes surrounding a solid core, which offers a unique design flexibility to optimize their waveguide properties for specific applications. In particular, the design can be optimized to strongly reduce the cross-sensitivity of a sensor to parasitic physical parameters like temperature variations, as is the case for the sensor presented here. Our sensor is based on a Bragg grating inside a temperature independent highly birefringent MOF with a high transverse strain sensitivity, to evaluate vibrations by a polarimetric measurement of the reflection spectrum. This technique takes advantage of the stress-induced phase shift between the two orthogonally polarized fiber eigenmodes. It consists in coupling linearly polarized light through one arm of an optical coupler (50:50) in the sensing optical fiber in which a highly reflective fiber Bragg grating is inscribed. The reflected signal is analysed through a linear polarizer. The optical fiber is crushed by a mechanical transducer designed to transform the vibration into a mechanical stress transversal to the fiber’s axis. The vibration therefore induces a change of the phase modal birefringence that varies in time at the vibration frequency. In this study we show that using standard single-mode fibers to realize the sensor do not provide stable measurements and that using conventional polarization-maintaining fibers lead to a significant cross-sensitivity to temperature. We then show that the use of a specific type of highly birefringent microstructured optical fiber allows temperature independent (up to 120°C) and repeatable vibration measurements.

Proceedings Article | 2 May 2014 Paper

Photonic crystal lenses for transverse focusing of laser illumination in microstructured optical fibers

Tigran Baghdasaryan, Thomas Geernaert, Hugo Thienpont, Francis Berghmans

Proc. SPIE. 9128, Micro-structured and Specialty Optical Fibres III

KEYWORDS: Refractive index, Photonic crystal fibers, Femtosecond phenomena, Polarization, Lenses, Cladding, Manufacturing, Photonic crystals, Structured optical fibers, Micro optical fluidics

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Proceedings Article | 2 May 2014 Paper

Fiber Bragg grating-based shear strain sensors for adhesive bond monitoring

Sanne Sulejmani, Camille Sonnenfeld, Thomas Geernaert, Danny Van Hemelrijck, Geert Luyckx, Pawel Mergo, Waclaw Urbanczyk, Karima Chah, Christophe Caucheteur, Patrice Mégret, Hugo Thienpont, Francis Berghmans

Proc. SPIE. 9128, Micro-structured and Specialty Optical Fibres III

KEYWORDS: Thermal sensing, Optical fibers, Fiber Bragg gratings, Sensors, Structured optical fibers, Fiber optics sensors, Structural health monitoring, Adhesives, Mechanical sensors, Micro optical fluidics

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Proceedings Article | 3 May 2013 Paper

Embedded fiber Bragg gratings in photonic crystal fiber for cure cycle monitoring of carbon fiber-reinforced polymer materials

C. Sonnenfeld, G. Luyckx, F. Collombet, Y.-H. Grunevald, B. Douchin, L. Crouzeix, M. Torres, T. Geernaert, S. Sulejmani, S. Eve, M. Gomina, K. Chah, P. Mergo, H. Thienpont, F. Berghmans

Proc. SPIE. 8775, Micro-structured and Specialty Optical Fibres II

KEYWORDS: Carbon, Optical fibers, Photonic crystal fibers, Birefringence, Fiber Bragg gratings, Sensors, Calibration, Composites, Fiber reinforced polymers, Temperature metrology

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Proceedings Article | 18 December 2012 Paper

Applying optical design methods to the development of application specific photonic crystal fibres

Francis Berghmans, Thomas Geernaert, Marek Napierała, Tigran Baghdasaryan, Camille Sonnenfeld, Sanne Sulejmani, Tomasz Nasiłowski, Paweł Mergo, Tadeusz Martynkien, Wacław Urbańczyk, Elżbieta Bereś-Pawlik, Hugo Thienpont

Proc. SPIE. 8550, Optical Systems Design 2012

KEYWORDS: Refractive index, Photonic crystal fibers, Femtosecond phenomena, Silica, Birefringence, Fiber Bragg gratings, Cladding, Structured optical fibers, Fiber lasers, Absorption

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Proceedings Article | 17 October 2012 Paper

Rocking filter in microstructured fiber for high resolution hydrostatic pressure measurements

A. Anuszkiewicz, G. Statkiewicz-Barabach, T. Borsukowski, J. Olszewski, T. Martynkien, D. Kowal, W. Urbanczyk, P. Mergo, M. Makara, K. Poturaj, T. Geernaert, F. Berghmans, H. Thienpont

Proc. SPIE. 8421, OFS2012 22nd International Conference on Optical Fiber Sensors

KEYWORDS: Optical fibers, Optical filters, Polarization, Birefringence, Fiber Bragg gratings, Cladding, Sensors, Carbon dioxide lasers, Polarimetry, Temperature metrology

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Proceedings Article | 26 April 2012 Paper

Microstructure-assisted grating inscription in photonic crystal fibers

Tigran Baghdasaryan, Thomas Geernaert, Francis Berghmans, Hugo Thienpont

Proc. SPIE. 8426, Microstructured and Specialty Optical Fibres

KEYWORDS: GRIN lenses, Refractive index, Photonic crystal fibers, Femtosecond phenomena, Silica, Fiber Bragg gratings, Cladding, Glasses, Photonic crystals, Absorption

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Proceedings Article | 26 April 2012 Paper

On the influence of hexagonal lattice photonic crystal fiber parameters on femtosecond grating inscription

Tigran Baghdasaryan, Thomas Geernaert, Francis Berghmans, Hugo Thienpont

Proc. SPIE. 8426, Microstructured and Specialty Optical Fibres

KEYWORDS: Refractive index, Photonic crystal fibers, Femtosecond phenomena, Finite-difference time-domain method, Silica, Fiber Bragg gratings, Cladding, Ultraviolet radiation, Optical simulations, Absorption

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Proceedings Article | 26 April 2012 Paper

Mechanical reliability of microstructured optical fibers: a comparative study of tensile and bending strength

C. Sonnenfeld, S. Sulejmani, T. Geernaert, S. Eve, M. Gomina, M. Makara, K. Skorupski, P. Mergo, F. Berghmans, H. Thienpont

Proc. SPIE. 8426, Microstructured and Specialty Optical Fibres

KEYWORDS: Optical fibers, Silica, Cladding, Glasses, Coating, Reliability, Structured optical fibers, Scanning electron microscopy, Failure analysis, Micro optical fluidics

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Proceedings Article | 29 November 2011 Paper

Photonic crystal fibre Bragg grating based sensors: opportunities for applications in healthcare

Francis Berghmans, Thomas Geernaert, Sanne Sulejmani, Hugo Thienpont, Geert Van Steenberge, Bram Van Hoe, Peter Dubruel, Waclaw Urbanczyk, Pawel Mergo, David Webb, Kyriacos Kalli, Jan Van Roosbroeck, Kate Sugden

Proc. SPIE. 8311, Optical Sensors and Biophotonics III

KEYWORDS: Optical fibers, Photonic crystal fibers, Medicine, Silica, Fiber Bragg gratings, Sensors, Polymers, Fiber optics sensors, Phase only filters, Polymeric sensors

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Proceedings Article | 14 May 2010 Paper

UV Bragg grating inscription in germanium-doped photonic crystal fibers

Thomas Geernaert, Martin Becker, Pawel Mergo, Tomasz Nasilowski, Jan Wojcik, Waclaw Urbanczyk, Manfred Rothhardt, Christoph Chojetzki, Hartmut Bartelt, Francis Berghmans, Hugo Thienpont

Proc. SPIE. 7714, Photonic Crystal Fibers IV

KEYWORDS: Step index fibers, Refractive index, Photonic crystal fibers, Modulation, Fiber Bragg gratings, Ultraviolet radiation, Germanium, Doping, Fiber optics sensors, Specialty optical fibers

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Proceedings Article | 14 May 2010 Paper

Optical fiber sensors embedded in flexible polymer foils

Bram Van Hoe, Geert Van Steenberge, Erwin Bosman, Jeroen Missinne, Thomas Geernaert, Francis Berghmans, David Webb, Peter Van Daele

Proc. SPIE. 7726, Optical Sensing and Detection

KEYWORDS: Optical fibers, Optical sensors, Silica, Fiber Bragg gratings, Sensors, Polymers, Skin, Fiber optics sensors, Polymer optical fibers, Phase only filters

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Proceedings Article | 5 October 2009 Paper

Point-by-point Bragg grating inscription in single-mode microstructure fibre using NIR femtosecond laser

K. Kalli, T. Geernaert, C. Koutsides, M. Komodromos, T. Nasilowski, W. Urbanczyk, J. Wojcik, F. Berghmans, H. Thienpont

Proc. SPIE. 7503, 20th International Conference on Optical Fibre Sensors

KEYWORDS: Optical fibers, Near infrared, Microscopes, Diffraction, Femtosecond phenomena, Fiber Bragg gratings, Pulsed laser operation, Micro optical fluidics, Temperature metrology, Laser systems engineering

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Proceedings Article | 5 October 2009 Paper

Benchmarking the response of Bragg gratings written in micro-structured and bow tie fiber embedded in composites

G. Luyckx, E. Voet, T. Geernaert, K. Chah, T. Nasilowski, W. De Waele, M. Becker, H. Bartelt, W. Urbanczyk, J. Wojcik, J. Degrieck, F. Berghmans, H. Thienpont

Proc. SPIE. 7503, 20th International Conference on Optical Fibre Sensors

KEYWORDS: Carbon, Optical fibers, Birefringence, Fiber Bragg gratings, Sensors, Composites, Structured optical fibers, Epoxies, Micro optical fluidics, Temperature metrology

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Proceedings Article | 20 May 2009 Paper

Fiber Bragg gratings in microstructured optical fibers for stress monitoring

Thomas Geernaert, Geert Luyckx, Eli Voet, Tomasz Nasilowski, Karima Chah, Martin Becker, Hartmut Bartelt, Waclaw Urbanczyk, Jan Wójcik, Wim De Waele, Joris Degrieck, Francis Berghmans, Hugo Thienpont

Proc. SPIE. 7357, Photonic Crystal Fibers III

KEYWORDS: Optical fibers, Refractive index, Silica, Birefringence, Fiber Bragg gratings, Sensors, Composites, Structured optical fibers, Fiber optics sensors, Micro optical fluidics

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Proceedings Article | 21 April 2008 Paper

The fabrication and characterization of fiber Bragg gratings in highly birefringent photonic crystal fibers for sensing applications

Thomas Geernaert, Tomasz Nasilowski, Karima Chah, Martin Becker, Manfred Rothhardt, Marcin Szpulak, Jacek Olszewski, Krzysztof Poturaj, Jan Wójcik, Waclaw Urbanczyk, Herman Terryn, Hartmut Bartelt, Francis Berghmans, Hugo Thienpont

Proc. SPIE. 6990, Photonic Crystal Fibers II

KEYWORDS: Step index fibers, Photonic crystal fibers, Polarization, Birefringence, Fiber Bragg gratings, Sensors, Annealing, Multiplexing, Single mode fibers, Excimer lasers

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