Resonantly Induced Refractive Index Changes in Yb-doped Fibers: the Origin, Properties and Application for All-Fiber Coherent Beam Combining

Fotiadi, Andrei A.; Антипов, О.Л.; Mégret, Patrice

doi:10.5772/39553

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Monitoring of gamma-irradiated Yb-doped optical fibers through the pump induced refractive index change effect

Pekukhova

Fotiadi

Shubin

et al. 2011

2011 2nd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and Their Applications

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We report on the method for monitoring of the modifications in Yb-doped optical fibers irradiated by gammarays 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.

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