Abstract

We studied the effect of Co <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">60</sup> gamma-radiation on the peak position and the amplitude of fiber Bragg gratings. The gratings were written with a femto-second UV laser in three different fibers, both intrinsically highly photosensitive and hydrogen sensitized. We have found that in contrast with the results obtained on gratings written with UV-lasers, the Bragg peak shift under radiation is almost independent on the fiber type, the use of hydrogen loading, or grating amplitude. The grating amplitude change depends on the fiber type.

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