Online Gamma Radiation Monitoring Using Few-Mode Polymer CYTOP Fiber Bragg Gratings

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

Publikováno v: Sensors, Vol 23, Iss 1, p 39 (2022)

We investigated the gamma radiation response of fiber Bragg gratings (FBGs) inscribed in a few-mode polymer optical fiber. The fiber had a graded-index CYTOP core of 20 µm and XYLEX overclad of 250 µm in diameter. Four FBGs were exposed to gamma ra

Externí odkaz: https://doaj.org/article/459ac74ed4b64f96aeabe554ccc32df8

Fast Bragg Grating Inscription in PMMA Polymer Optical Fibres: Impact of Thermal Pre-Treatment of Preforms

Autor: Carlos A. F. Marques, Andreas Pospori, Gökhan Demirci, Onur Çetinkaya, Barbara Gawdzik, Paulo Antunes, Ole Bang, Pawel Mergo, Paulo André, David J. Webb

Publikováno v: Sensors, Vol 17, Iss 4, p 891 (2017)

In this work, fibre Bragg gratings (FBGs) were inscribed in two different undoped poly- (methyl methacrylate) (PMMA) polymer optical fibres (POFs) using different types of UV lasers and their inscription times, temperature and strain sensitivities ar

Externí odkaz: https://doaj.org/article/48f6b60b2f5f40e78f0abaab666ae659

Time-dependent variation of POF Bragg grating reflectivity and wavelength submerged in different liquids

Autor: Andreas Pospori, Carlos Marques, David J. Webb

Publikováno v: Optics & Laser Technology. 94:234-239

In this work, we investigate the time-dependent variation of both the reflectivity and resonance wavelength of microstructured polymer optical fiber Bragg grating (mPOFBG) array sensors embedded in silicone rubber and polyurethane resin diaphragms in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eafa4f5bec3c09d4c84a944833364de3
https://doi.org/10.1016/j.optlastec.2017.03.038

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

Autor: David Sáez-rodríguezd, Kristian Nielsen, Georgios Sagias, David J. Webb, Ole Bang, Andreas Pospori, Carlos Marques, Horacio Lamela-rivera

Publikováno v: Seventh European Workshop on Optical Fibre Sensors
Pospori, A, Marques, C A F, Sagias, G, Lamela-Rivera, H, Sáez-Rodríguezd, D, Nielsen, K, Bang, O & Webb, D J 2019, Utilising thermal annealing for multiplexing and sensitivity enhancement of polymer optical fibre sensors . in K Kalli, G Brambilla & S O'Keeffe (eds), Proceedings of SPIE . vol. 11199, 111993E, SPIE-International Society for Optical Engineering, Proceedings of SPIE-The International Society for Optical Engineering, vol. 11199, 7th European Workshop on Optical Fibre Sensors, Limassol, Cyprus, 01/10/2019 . https://doi.org/10.1117/12.2541767

Thermal annealing was initially introduced for multiplexing purposes, since it can induce a permanent negative Bragg wavelength shift for polymer fibre grating sensors. At a later stage, it is shown that annealing can also provide additional benefits

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0dd03e049ec37e49adf98534ecde9718

High-quality Phase-Shifted Bragg grating sensor inscribed with only one laser pulse in a polymer optical fiber

Autor: Carlos Marques, Andreas Pospori, Ole Bang, Paulo André, David J. Webb, Paulo Antunes, S. Marques, Luis Pereira

We present the first phase-shifted polymer optical fiber Bragg grating sensor inscribed with only one KrF laser pulse. The phase shift defect was created directly during the grating inscription process by placing a very narrow blocking aperture, in t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64571ce6b278a9900e2fd725b66d9d2a
https://publications.aston.ac.uk/id/eprint/33022/1/High_quality_phase_shifted_Bragg_grating_sensor.pdf