Abstract
We investigate the effect of γ-radiation on temperature (T) and relative humidity (RH) sensitivities of polymer perfluorinated fiber Bragg gratings (FBGs). To this aim, different γ-radiation doses (80, 120, 160, and 520 kGy) were applied to a set of FBGs. We show that irradiated FBGs demonstrate an RH sensitivity rise with the received dose: from 13.3 pm/%RH for a pristine FBG up to 56.8 pm/%RH for a 520-kGy dose at 30℃. In contrast, T sensitivity decreases with radiation dose with a subsequent change of sign from positive to negative. Therefore, by experimental interpolation, T sensitivity can be eliminated at around a 160-kGy dose. This opens the possibility of designing an RH sensor with enhanced sensitivity, which at the same time is insensitive to T.
Original language | English |
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Pages (from-to) | 1248–1251 |
Number of pages | 4 |
Journal | Optics letters |
Volume | 48 |
Issue number | 5 |
DOIs | |
State | Published - 1 Mar 2023 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics