Specific Absorption Coefficient of Ni²⁺ Ions in TeO₂–ZnO–Bi₂O₃ Glasses

Transmission of Ni²⁺-doped multicomponent glasses in the TeO₂–ZnO–Bi₂O₃ system has been studied by optical spectroscopy. The spectra of the glasses contain three strong absorption bands, peaking at 0.43, 0.80, and 1.32 μm. We evaluated the specific absorption coefficient of a particular glass matrix containing a certain amount of Ni²⁺. At a wavelength of 0.80 μm, it is 15.9 ± 1.3 cm^–1/wt %. In addition, we obtained its spectral dependence throughout the transmission window of the glass and estimated the integrated absorption coefficient of the glass in the wavenumber range 3600–16 500 cm^–1: 10.6 ± 0.5 cm^–2/ppm.