Effect of Low-Doses of Gamma Radiation on Electric Arc-Induced Long Period Fiber Gratings.

Autor: Mesonero-Santos P; Space Optics Department, National Institute for Aerospace Technology (INTA), Carretera de Ajalvir km 4, 28850 Torrejón de Ardoz, Spain., Fernández-Medina A; Space Optics Department, National Institute for Aerospace Technology (INTA), Carretera de Ajalvir km 4, 28850 Torrejón de Ardoz, Spain., Coelho LCC; Department of Physics and Astronomy of Faculty of Sciences, INESC TEC-Institute for Systems and Computer Engineering, Technology and Science and Faculty for Sciences, University of Porto, 4169-007 Porto, Portugal., Viveiros D; Department of Physics and Astronomy of Faculty of Sciences, INESC TEC-Institute for Systems and Computer Engineering, Technology and Science and Faculty for Sciences, University of Porto, 4169-007 Porto, Portugal., Jorge PA; Department of Physics and Astronomy of Faculty of Sciences, INESC TEC-Institute for Systems and Computer Engineering, Technology and Science and Faculty for Sciences, University of Porto, 4169-007 Porto, Portugal., Belenguer T; Space Optics Department, National Institute for Aerospace Technology (INTA), Carretera de Ajalvir km 4, 28850 Torrejón de Ardoz, Spain., López Heredero R; Space Optics Department, National Institute for Aerospace Technology (INTA), Carretera de Ajalvir km 4, 28850 Torrejón de Ardoz, Spain.
Jazyk: angličtina
Zdroj: Sensors (Basel, Switzerland) [Sensors (Basel)] 2021 Mar 26; Vol. 21 (7). Date of Electronic Publication: 2021 Mar 26.
DOI: 10.3390/s21072318
Abstrakt: This work presents an experimental study on the effects of gamma radiation on Long Period Fiber Gratings (LPFGs) in a low-dose test campaign to evaluate their eventual degradation. The study was carried out with standard single-mode fibers where the grating was inscribed using the Electric-Arc Discharge (EAD) technique. Before the gamma campaign, a detailed optical characterization was performed with repeatability tests to verify the accuracy of the setup and the associated error sources. The gamma-induced changes up to a dose of 200 krad and the recovery after radiation were monitored with the Dip Wavelength Shift (DWS). The results show that the gamma sensitivity for a total dose of 200 krad is 11 pm/krad and a total DWS of 2.3 nm has been observed with no linear dependence. Post-radiation study shows that recovery from radiation-induced wavelength shift is nearly complete in about 4000 h. Experimental results show that the changes suffered under gamma irradiation of these LPFGs are temporary making them a good choice as sensors in space applications.
Databáze: MEDLINE
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