FIBER DRAWING OF LINBO3-DOPED MIXED-ALKALI TELLURITE GLASSES

A transparent mixed alkali tellurite glass of 10Li(2)O-10Na(2)O-80TeO( 2) containing LiNbO3 crystals with a diameter of about 4 mu m and with the amount of about 6 mass% is prepared using an incorporation method , and LiNbO3-doped tellurite glass fibers are drawn. LiNbO3 particles in the fiber and bulk samples are well dispersed. The samples also hav e a good transparency. The mixed alkali tellurite glass with a high th ermal stability against crystallization and with a high refractive ind ex of n = 1.98 is very suitable for incorporation of LiNbO3 crystals a nd for LiNbO3-doped fiber drawing. This technique will be applicable f or fabrications of nonlinear optical glass fibers containing various n onlinear optical crystals.