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The glasses in Bi-Ge-O system doped with Cr2O3 or Nd2O3 were synthesized by melt-quenching technique. The bismuth optically active centers (Bi-centers) in the undoped and Nd3+-doped glasses were found by optical spectroscopy. The effect of initial glass compositions, doping ions nature and concentrations as soon as various heat-treatment conditions on the Bi-centers formation and destruction was revealed and discussed.