Title :
Monitoring of gamma-irradiated Yb-doped optical fibers through the pump induced refractive index change effect
Author :
Pekukhova, I. ; Fotiadi, A.A. ; Shubin, A.V. ; Tomashuk, A.L. ; Novikov, S.G. ; Zolotovskiy, I.O. ; Antipov, K.L. ; Panajotov, K. ; Thienpont, H. ; Mégret, P.
Author_Institution :
Univ. of Mons, Mons, Belgium
Abstract :
We report on the method for monitoring of the modifications in Yb-doped optical fibers irradiated by gamma-rays with the doses 1, 2, 4 and 8 kGy. This method is based on the refractive index change (RIC) effect induced in the tested fibers by square modulated optical pump pulses of 1 ms duration at 980 nm with the power up to 100 mW. The applied in-situ monitoring is based on interferometric technique and highlights the key parameters of the RIC effect that allows to characterize quantitatively the degree of the fiber degradation under the gamma irradiation.
Keywords :
gamma-ray effects; light interferometry; optical fibre testing; optical pumping; refractive index; ytterbium; RIC effect; fiber degradation; gamma-irradiated Yb-doped optical fibers; interferometric technique; pump induced refractive index change effect; radiation absorbed dose 1 kGy; radiation absorbed dose 2 kGy; radiation absorbed dose 4 kGy; radiation absorbed dose 8 kGy; square modulated optical pump pulses; time 1 ms; wavelength 980 nm; Optical fibers; Optical interferometry; Optical pumping; Optical refraction; Optical variables control; Refractive index;
Conference_Titel :
Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2011 2nd International Conference on
Conference_Location :
Ghent
Print_ISBN :
978-1-4577-0925-8
DOI :
10.1109/ANIMMA.2011.6172839
