Gamma radiation-induced blue shift of resonance peaks of Bragg gratings in pure silica fibres

Andrei Goussarov, Alexey Faustov, Patrice Mégret, Marc Wuilpart, Damien Kinet, Andrey Zhukov, S.G. Novikov, V.V. Svetukhin, A.A. Fotiadi

    Research outputpeer-review


    We report the first observation of a significant gamma radiation-induced blue shift of the reflection/transmission peak of fibre Bragg gratings inscribed into pure-silica core fibres via multiphoton absorption of femtosecond pulses. At a total dose of ~100 kGy, the shift is ~20 pm. The observed effect is attributable to the ionising radiation-induced decrease in the density of the silica glass when the rate of colour centre formation is slow. We present results of experimental measurements that provide the key parameters of the dynamics of the gratings for remote dosimetry and temperature sensing.
    Original languageEnglish
    Pages (from-to)150-154
    Number of pages5
    JournalQuantum Electronics
    Issue number2
    StatePublished - 1 Feb 2016

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