Dr. Andreas A. Ioannou Profile

Dr. Andreas A. Ioannou

Postdoctoral Researcher

SPIE Involvement:

Author

Publications (30)

Proceedings Article | 20 June 2024 Paper

Measurements of the chromatic refractive index signature of wine models using a fibre long period gratings

T. Allsop, A. Ioannou, K. Kalli, R. Bhamber, E. Aguera, A. Samson, P. Rigou, C. Saucier, B. Dussardier

Proceedings Volume 12999, 1299902 (2024) https://doi.org/10.1117/12.3022049

KEYWORDS: Fiber Bragg gratings, Signal attenuation, Cladding, Refractive index, Optical fibers, Sensors, Liquids, Optical transmission, Optical gratings, Femtosecond phenomena

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Proceedings Article | 31 May 2023 Poster + Paper

EAC power distribution line cable monitoring using state-of-the-art distributed sensing instruments

Andreas Ioannou, Maria Argyrou, Charalambos Kouzoupou, Kyriacos Kalli, Pierpaolo Marchesini, Michael Mondanos, Rumen Karaulanov, Andreas Stavrou, Antreas Dionysiou, Michalis Agathocleous, Efstathios Stavrakis, Nicolas Nicolaou, Alexis Polycarpou, Michael Komodromos

Proceedings Volume 12572, 125721M (2023) https://doi.org/10.1117/12.2666048

KEYWORDS: Optical fibers, Optical fiber cables, Temperature metrology, Sensing systems, Optical sensing, Optical transmission, Equipment, Environmental sensing, Vibration, Power consumption

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Proceedings Article | 31 May 2023 Presentation + Paper

Application of machine learning on optical fibre distributed sensing for power line applications

Kyriacos Kalli, Andreas Ioannou, Georgios Panaretou, Charalambos Kouzoupou, Maria Argyrou, Sotirios Chatzis, Michalis Agathocleous, Antreas Dionysiou, Efstathios Stavrakis, Nicolas Nicolaou

Proceedings Volume 12572, 125720Q (2023) https://doi.org/10.1117/12.2666050

KEYWORDS: Optical fibers, Temperature metrology, Machine learning, Optical fiber cables, Education and training, Data modeling, Sensing systems, Optical transmission, Optical sensing, Calibration

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Proceedings Article | 31 May 2023 Poster + Paper

A method of fitting BOTDA data for the estimation of the Brillouin frequency shift

Michael Komodromos, Alexis Polycarpou, Andreas Ioannou, Maria Argyrou, Kyriacos Kalli

Proceedings Volume 12572, 125721Z (2023) https://doi.org/10.1117/12.2670521

KEYWORDS: Signal to noise ratio, Data acquisition, Tolerancing, Temperature metrology, Computing systems, Tunable filters, Sensing systems, Laser frequency, Data analysis, Statistical analysis

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Proceedings Article | 30 May 2023 Paper

Post-radiation effects of core pumped monolithic holmium-doped silica fibre lasers

A. Theodosiou, L. Koutsokeras, A. Ioannou, A. Stancalie, C. Negut, J. Aubrecht, P. Peterka, G. Constantinides, K. Kalli

Proceedings Volume 12573, 125730U (2023) https://doi.org/10.1117/12.2665051

KEYWORDS: Fiber lasers, Fiber Bragg gratings, Laser radiation, Silica, Raman spectroscopy, Optical fibers, Holmium, Annealing, Temperature metrology, Spectroscopy

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Proceedings Article | 30 May 2023 Paper

Signal processing treatments for static and dynamic Brillouin distributed sensing

A. Theodosiou, C. Kouzoupou, A. Ioannou, M. Komodromos, K. Kalli

Proceedings Volume 12573, 125730T (2023) https://doi.org/10.1117/12.2665050

KEYWORDS: Fiber Bragg gratings, Demodulation, Signal processing, Optical fibers, Spatial resolution, Sensors, Mathematical optimization, Temperature metrology, Reflection, Materials properties

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Proceedings Article | 30 May 2023 Paper

Humidity responsivity of CYTOP-XYLEX fibre Bragg grating sensors

A. Ioannou, A. Pospori, K. Kalli

Proceedings Volume 12573, 1257304 (2023) https://doi.org/10.1117/12.2664544

KEYWORDS: Sensors, Humidity, Fiber Bragg gratings, Polymers, Bragg wavelengths, Fiber optics sensors, Polymer optical fibers, Relative humidity

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Proceedings Article | 30 May 2023 Poster + Paper

Elimination of temperature cross-sensitivity for polymer FBG-based humidity sensor by gamma radiation treatment

Ivan Chapalo, Andrei Gussarov, Karima Chah, Andreas Ioannou, Andreas Pospori, Ying-Gang Nan, Kyriacos Kalli, Patrice Mégret

Proceedings Volume 12573, 1257315 (2023) https://doi.org/10.1117/12.2671965

KEYWORDS: Fiber Bragg gratings, Polymer optical fibers, Gamma radiation, Polymers, Sensors, Polymeric sensors, Humidity, Femtosecond phenomena

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Proceedings Article | 23 May 2023 Paper

Power cable simulation of failure through temperature monitoring of optical fibres with a state-of-the-art distributed sensing instrument

Andreas Ioannou, Andreas Metaxas, Maria Argyrou, Charalambos Kouzoupou, Kyriacos Kalli, Sotirios Chatzis, Georgios Panaretou, Pierpaolo Marchesini, Michael Mondanos, Rumen Karaulanov, Michalis Agathocleous, Antreas Dionysiou, Efstathios Stavrakis, Nicolas Nicolaou

Proceedings Volume 12643, 1264325 (2023) https://doi.org/10.1117/12.2678087

KEYWORDS: Optical fibers, Optical fiber cables, Optical transmission, Optical sensing, Temperature metrology, Failure analysis, Sensing systems, Device simulation, Reflection, Equipment

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Proceedings Article | 23 May 2023 Paper

Concrete curing monitoring using polymer optical fibre Bragg grating sensors

A. Pospori, A. Ioannou, J. Melo, P. Antunes, H. Varum, C. A. Marques, K. Kalli

Proceedings Volume 12643, 126430H (2023) https://doi.org/10.1117/12.2678107

KEYWORDS: Civil engineering, Sensors, Optical fibers, Prototyping, Polymers, Polymeric sensors, Bragg gratings, Optical sensing, Moisture, Bragg wavelengths

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Proceedings Article | 23 May 2023 Paper

Temperature and RH response of polymer CYTOP FBG treated by gamma radiation

Ivan Chapalo, Andrei Gusarov, Karima Chah, Andreas Ioannou, Andreas Pospori, Ying-Gang Nan, Kyriacos Kalli, Patrice Mégret

Proceedings Volume 12643, 1264305 (2023) https://doi.org/10.1117/12.2678326

KEYWORDS: Fiber Bragg gratings, Polymers, Polymer optical fibers, Gamma radiation, Sensors, Vacuum chambers, Relative humidity, Climatology, Fiber optics sensors, Fiber optics

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Proceedings Article | 19 May 2022 Presentation + Paper

Perfluorinated polymer fibre Bragg grating sensors for distributed low-dose clinical X-ray measurements

O. Olusoji, W. Kam, A. Ioannou, A. Posporis, F. McGuinness, P. Woulfe, K. Kalli, S. O'Keeffe

Proceedings Volume 12140, 121400K (2022) https://doi.org/10.1117/12.2624440

KEYWORDS: Fiber Bragg gratings, X-rays, Optical fibers, Sensors, Radiation effects, Polymers, Radiotherapy, Reflectometry, Polymeric sensors, Tissues

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Proceedings Article | 19 May 2022 Presentation + Paper

Pre-strain effects on CYTOP fibre Bragg grating temperature sensors

A. Posporis, A. Ioannou, K. Kalli

Proceedings Volume 12140, 121400J (2022) https://doi.org/10.1117/12.2624501

KEYWORDS: Sensors, Temperature metrology, Fiber Bragg gratings, Polymers, Optical fibers, Silica, Polymeric sensors, Humidity, Cladding

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Proceedings Article | 19 May 2022 Presentation + Paper

Plastic scintillator-based fibre dosimeters for measurement of X-ray pulses in a clinical setting

W. Kam, A. Ioannou, M. Martyn, F. Sullivan, A. Pospori, P. Woulfe, K. Kalli, S. O'Keeffe

Proceedings Volume 12140, 121400D (2022) https://doi.org/10.1117/12.2624516

KEYWORDS: Sensors, X-rays, Scintillators, Radiotherapy, Femtosecond phenomena, Radiation effects, Polymethylmethacrylate, Oscilloscopes

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Proceedings Article | 19 May 2022 Presentation + Paper

Femtosecond laser modified Fabry-Pérot interferometer optical fibre tip sensor for monitoring dissolved oxygen

Andreas Ioannou, Sotia Zavrou, Aristi Christofi, KyriaKos Kalli

Proceedings Volume 12140, 121400E (2022) https://doi.org/10.1117/12.2623694

KEYWORDS: Sensors, Oxygen, Refractive index, Femtosecond phenomena, Optical fibers, Sodium, Interferometers, Fiber Bragg gratings, Water, Temperature metrology

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Proceedings Article | 17 May 2022 Paper

Monitoring the temperature and vibration response of underground optical fibres collocated with the EAC power distribution cables using state-of-the-art distributed sensing instruments

Andreas Ioannou, Charalambos Kouzoupou, Maria Argyrou, Kyriacos Kalli, Pierpaolo Marchesini, Michael Mondanos, Rumen Karaulanov, Andreas Stavrou, Marios Papaconstantinou

Proceedings Volume 12139, 121391M (2022) https://doi.org/10.1117/12.2624375

KEYWORDS: Optical fibers, Temperature metrology, Optical fiber cables, Sensing systems, Calibration, Climatology, Distribution cables, Raman spectroscopy, Head, Data conversion

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Proceedings Article | 17 May 2022 Paper

Machine learning applied to BOTDR optical fibre distributed sensing in a controlled environment

Andreas Ioannou, Charalambos Kouzoupou, Maria Argyrou, Kyriacos Kalli, Adam Lantos, Sotirios Chatzis

Proceedings Volume 12139, 121391O (2022) https://doi.org/10.1117/12.2624532

KEYWORDS: Optical fibers, Temperature metrology, Machine learning, Optical fiber cables, Calibration, Sensing systems, Optical sensing, Data modeling, Binary data, Neural networks

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Proceedings Article | 18 April 2021 Presentation + Paper

Radiation induced effects on FBGs using different femtosecond laser inscription methods

A. Theodosiou, A. Leal-Junior, C. Marques, A. Frizera, A. J. Fernandes, A. Stancalie, A. Ioannou, D. Negut, K. Kalli

Proceedings Volume 11773, 117730P (2021) https://doi.org/10.1117/12.2592376

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Proceedings Article | 18 April 2021 Presentation + Paper

Developments in laser processing of optical fibre radiation sensors

Andreas Ioannou, Aristi Christofi, Sotia Zavrou, Kyriacos Kalli, David Jackson, Wern Kam, Peter Woulfe, Sinead O’Keeffe, Francis Sullivan

Proceedings Volume 11773, 117730Q (2021) https://doi.org/10.1117/12.2592483

KEYWORDS: Sensors, Optical fibers, Laser processing, Laser development, Scintillators, Compound parabolic concentrators, Solar concentrators, Radiation dosimetry, Polymers, Polymer optical fibers

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Proceedings Article | 1 April 2020 Paper

Femtosecond laser written long period grating in a multimode CYTOP polymer fibre

Antreas Theodosiou, Rui Min, Arnaldo Leal, Andreas Ioannou, Anselmo Frizera-Neto, Maria Jose Pontes, Carlos Marques, Kyriacos Kalli

Proceedings Volume 11355, 1135502 (2020) https://doi.org/10.1117/12.2557804

KEYWORDS: Polymers, Humidity, Femtosecond phenomena, Sensors, Cladding, Temperature metrology, Fiber Bragg gratings, Gradient-index optics, Polymeric sensors, Optical sensors

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Proceedings Article | 1 April 2020 Paper

Femtosecond laser inscribed Mach-Zehnder Interferometer: a compound all-in-fiber versatile sensing device

Andreas Ioannou, Antreas Theodosiou, Christophe Caucheteur, Kyriacos Kalli

Proceedings Volume 11355, 113550N (2020) https://doi.org/10.1117/12.2553050

KEYWORDS: Fiber Bragg gratings, Cladding, Humidity, Femtosecond phenomena, Refractive index, Waveguides, Sensors, Mach-Zehnder interferometers, Structured optical fibers, Temperature metrology

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Proceedings Article | 28 August 2019 Paper

Multi-core optical fibre shape sensing with femtosecond laser inscribed bridging cladding waveguides

K. Kalli, A. Theodosiou, S. Stojanovic, Andreas Ioannou

Proceedings Volume 11199, 1119931 (2019) https://doi.org/10.1117/12.2540418

KEYWORDS: Waveguides, Fiber Bragg gratings, Optical fibers, Sensors, Femtosecond phenomena, Cladding, Optical sensing, Calibration, Fusion splicing, Pulsed laser operation

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Proceedings Article | 28 August 2019 Paper

Carbon coated FBGs inscribed using the plane-by-plane femtosecond laser inscription method

Antreas Theodosiou, Kyriacos Kalli, Andy Gillooly, Andreas Ioannou

Proceedings Volume 11199, 111992Z (2019) https://doi.org/10.1117/12.2540157

KEYWORDS: Carbon, Fiber Bragg gratings, Femtosecond phenomena, Temperature metrology, Optical fibers, Reflection, Fiber coatings, Sensors, Pulsed laser operation, Environmental sensing

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Proceedings Article | 28 August 2019 Paper

Fibre cladding interferometers and Bragg gratings made via plane by plane femtosecond laser inscription

A. Theodosiou, A. Ioannou, K. Kalli

Proceedings Volume 11199, 1119930 (2019) https://doi.org/10.1117/12.2540158

KEYWORDS: Waveguides, Cladding, Sensors, Fiber Bragg gratings, Femtosecond phenomena, Humidity, Bragg gratings, Optical fibers, Interferometers, Refractive index

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Proceedings Article | 9 May 2018 Presentation + Paper

Coating influence on the refractometric sensitivity of plasmonic optical fiber grating spectral combs

Christophe Caucheteur, Médéric Loyez, Andreas Ioannou, Álvaro González-Vila

Proceedings Volume 10680, 106800K (2018) https://doi.org/10.1117/12.2307162

KEYWORDS: Gold, Coating, Refractive index, Cladding, Optical fibers, Sputter deposition, Surface plasmons, Plasmonics, Metals

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Proceedings Article | 9 May 2018 Paper

Sensing capabilities of higher order cladding modes

Andreas Ioannou, Antreas Theodosiou, Kyriacos Kalli, Christophe Caucheteur

Proceedings Volume 10680, 106801S (2018) https://doi.org/10.1117/12.2306736

KEYWORDS: Cladding, Refractive index, Femtosecond phenomena, Temperature metrology, Fiber Bragg gratings, Optical fibers, Modulation, Spectrum analysis, Telecommunications, Single mode fibers

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Proceedings Article | 9 May 2018 Paper

Requirements for surface plasmon resonance excitation in air with slightly tilted fiber Bragg gratings

Álvaro González-Vila, Médéric Loyez, Andreas Ioannou, Christophe Caucheteur

Proceedings Volume 10680, 106801W (2018) https://doi.org/10.1117/12.2307400

KEYWORDS: Refractive index, Fiber Bragg gratings, Gold, Plasmonics, Gases, Optical fibers, Sensors, Surface plasmons, Optical sensors

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Proceedings Article | 23 April 2017 Paper

Femtosecond laser processing of optical fibres for novel sensor development

Kyriacos Kalli, Antreas Theodosiou, Andreas Ioannou, Amedee Lacraz

Proceedings Volume 10323, 103232S (2017) https://doi.org/10.1117/12.2263523

KEYWORDS: Optical fibers, Fiber Bragg gratings, Sensors, Waveguides, Femtosecond phenomena, Structured optical fibers, Cladding, Polymer optical fibers, Silica, Polymers

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Proceedings Article | 28 April 2016 Paper

Femtosecond laser waveguide and FBG inscription in four-core optical fibre

Antreas Theodosiou, Andreas Ioannou, Michael Polis, Amédée Lacraz, Charalambos Koutsides, Kyriacos Kalli

Proceedings Volume 9886, 98860F (2016) https://doi.org/10.1117/12.2230801

KEYWORDS: Waveguides, Fiber Bragg gratings, Optical fibers, Femtosecond phenomena, Waveguide lasers, Sensors, Cladding, Fusion splicing, Spectroscopy, Fiber couplers

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Proceedings Article | 28 April 2016 Paper

Beam-shaping via femtosecond laser-modified optical fibre end faces

A. Ioannou, M. Polis, A. Lacraz, A. Theodosiou, K. Kalli

Proceedings Volume 9886, 98860J (2016) https://doi.org/10.1117/12.2230806

KEYWORDS: Diffraction, Optical fibers, Femtosecond phenomena, Binary data, Silica, Structured optical fibers, Diffraction gratings, Beam shaping, Visible radiation, Nondiffracting beams

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Showing 5 of 30 publications

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