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Dose-rate dependencies in gamma-irradiated fiber Bragg grating filters

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4 Author(s)
Fernandez Fernandez, Alberto ; Belgian Nucl. Res. Centre, SCK/CEN, Mol, Belgium ; Brichard, B. ; Berghmans, F. ; Decreton, M.

Wavelength-division multiplexed fiber-optic links could find applications in various radiation environments. The space industry, for example, could benefit from radiation-tolerant high-speed optical links for the next generation of observation satellites. For applications in the nuclear energy industry, the use of passive optical devices also needs to be evaluated at high dose rates and total doses. Our previous results have shown that in-fiber Bragg grating filters are key components in radiation-resistant passive optical links, as they showed a remarkably high radiation-acceptance level in terms of total absorbed dose. The dose-rate dependencies also need to be evaluated. We therefore studied gamma-irradiated fiber Bragg grating filters at several dose rates ranging from 1 to 25 kGy/h. We show, for the first time, that the dose rate does not affect the full-width at half-maximum of the Bragg peak and that the saturating Bragg peak shift remains.

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Nuclear Science, IEEE Transactions on  (Volume:49 ,  Issue: 6 )