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Title: Effect of Low-Doses of Gamma Radiation on Electric Arc-Induced Long Period Fiber Gratings
Authors: Mesonero Santos, P.
Fernández Medina, A.
Coelho, L. C. C.
Viveiros, D.
Jorge, P. A.
Belenguer, T.
López Heredero, R.
Keywords: Gamma irradiation;Electric arc discharge (EAD);Long period fiber grating (LPFG);Relaxation
Issue Date: 26-Mar-2021
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
DOI: 10.3390/s21072318
Published version:
Citation: Sensors 21(7): 2318(2021)
Abstract: 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.
E-ISSN: 1424-8220
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