Tellurite And Fluorotellurite Glasses For Active And Passive

Refractive index, n , at 632.8 nm
6. Optical properties; MDO 222
2.04
2.02
2.00
1.98
1.96
1.94
1.92
1.90
1.88
1.86
1.84
y = -0.00681x + 2.05412
R 2 = 0.99641
0 5 10 15 20 25 30 35
x ZnF2 / mol. %
Fig. (6.48): Variation in refractive index at 633 nm with ZnF2 content, for glass series
(90-x)TeO2-10Na2O-xZnF2 mol. %, for 5 ≤ x ≤ 30 mol. % (MOF001, 004 to 008) [5].
It can be seen, n decreased with increasing ZnF2.
Glass MOF009 to 013 were part of the series 65TeO2-(25-x)ZnF2-xZnO-10Na2O mol.
%, for 5 ≤ x ≤ 25 mol. %. Fig. (6.49) shows the variation of refractive index at 633 nm
with increasing oxide to fluoride ratio. Glass MOF001 (65TeO2-25ZnF2-10Na2O mol. %)
was used for oxide / fluoride = 0, as this composition complied with the formula 65TeO2-
(25-x)ZnF2-xZnO-10Na2O mol. %, x = 0. The error bars represent +3σ (i.e. 99.7 %
confidence intervals).