Search for: [Abstrakt = "Energy transfer processes from Cr3\+ to Nd3\+ and NIR luminescence of Nd3\+ ions at 1.06 μm in Cr–Nd co\-doped lead borate glasses have been investigated. The spectroscopic investigation indicates that Cr3\+ ions are located at strong\-field and weak\-field sites. Replacing PbO by PbF2 in lead borate glasses slightly influences the energy transfer processes between Cr3\+ and Nd3\+ and NIR luminescence of Nd3\+ ions. The energy transfer process occurs in both oxide and oxyfluoride glass systems, which may be due to the thermally induced population of the 4T2 excited state of Cr3\+ ions and the participation of lattice phonons."]

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