High-purity TeO sub(2)-WO sub(3)-(La sub(2)O sub(3), Bi sub(2)O sub(3)) glasses for fiber-optics

• Published in: Optical materials Vol. 33; no. 12; pp. 1911 - 1915
• Main Authors: Dorofeev, V V, Moiseev, AN, Churbanov, M F, Snopatin, GE, Chilyasov, A V, Kraev, IA, Lobanov, A S, Kotereva, T V, Ketkova, LA, Pushkin, A A, Gerasimenko, V V, Plotnichenko, V G, Kosolapov, A F, Dianov, E M
• Format: Journal Article
• Language: English
• Published: 01.10.2011
• Subjects: Absorption spectra; Calorimetry; Crucibles; Crystallization; Glass; Hydroxyl groups; Nickel; Noise levels
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2011.03.032

TeO sub(2)-WO sub(3), TeO sub(2)-WO sub(3)-La sub(2)O sub(3) and TeO sub(2)-WO sub(3)-La sub(2)O sub(3)-Bi sub(2)O sub(3) glasses were produced by high-purity oxides mixtures melting in crucibles of gold or platinum in purified oxygen atmosphere. The total content of Cu, Mn, Fe, Co and Ni impurities was not more than 0.1-2 ppm wt in glasses and below 0.1 ppm wt in the initial oxides. The hydroxyl groups absorption coefficients of the tellurite glasses at the maximum of the absorption band ([lambda] [approx] 3 mu m) lay in the region of 0.01-0.001 cm super(-1). Stability to crystallization characterized by T sub(x) - T sub(g) = 150-190 degree C was demonstrated for high purity 75TeO sub(2)-25WO sub(3) glasses by DSC-measurements. There were no thermal effects of crystallization and crystallized phases fusion in case of La sub(2)O sub(3)-containing glasses. The optical absorption losses, measured by the laser calorimetry method at [lambda] = 1.06, 1.56 and 1.97 mu m, did not exceed 40-120 dB/km for glass samples. The multimode optical fibers with optical losses of 50-250 dB/km at 1.2-2.2 mu m were produced from high-purity TeO sub(2)-WO sub(3)-(La sub(2)O sub(3), Bi sub(2)O sub(3)) glasses.