@article{8e7a726a147148b6a5e2598ed9b01b00,
title = "Temperature and RH Response of Few-Mode Polymer CYTOP/XYLEX FBGs: gamma-radiation tuning of sensing properties",
abstract = "We consider thermal and hygroscopic properties of polymer fiber Bragg gratings (PFBGs) inscribed in a few-mode perfluorinated CYTOP fiber with XYLEX protection overclad. The PFBGs were inscribed with a femtosecond laser using a plane-by-plane technique. The influence of γ-radiation treatment on PFBG temperature (T) and relative humidity (RH) sensitivities is presented. The RH sensitivity increases with received dose from 13.3 pm/%RH for pristine PFBG up to 56.8 pm/%RH for the dose of 520 kGy. The T sensitivity decreases from 19.6 pm/°C down to -38.9 pm/°C correspondingly. Irradiating the PFBGs with optimal γ-radiation dose (≈200 kGy) enables RH sensing with no T cross-sensitivity. The RH response time of PFBGs and its dependence on T and received γ-radiation dose is considered as well. Finally, the impact of RH on PFBGs reflection power is presented.",
keywords = "Annealing, fiber Bragg gratings, Fiber gratings, Fiber optic sensors, Optical fibers, polymer optical fibers, Radiation effects, Reflection, relative humidity sensors, Sensitivity, Sensors, temperature sensors, Fiber Bragg gratings, fiber optic sensors",
author = "Ivan Chapalo and Andrei Gusarov and Andreas Ioannou and Karima Chah and Andreas Pospori and Kyriacos Kalli and Patrice Megret",
note = "Score=10 Publisher Copyright: IEEE Publisher Copyright: {\textcopyright} 1983-2012 IEEE.",
year = "2024",
month = jun,
doi = "10.1109/JLT.2024.3420129",
language = "English",
volume = "42",
pages = "6262--6268",
journal = "Journal of Lightwave Technology",
issn = "0733-8724",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "18",
}