Abstract
Results of EPR and optical studies of chromium ions substituting niobium that undergoes photo-bleaching in LiNbO 3:Cr,MgO crystals are reported. Two-component kinetics of photo-bleaching are observed in EPR and optical measurements. The different Cr Nb centers exhibit very similar EPR signals in lithium niobate crystals. The possible mechanisms of different photo-bleaching kinetics are proposed.
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