Tellurite And Fluorotellurite Glasses For Active And Passive

6. Optical properties; MDO 221
6.2.2.2. Refractive index of fluorotellurite glasses
Table (6.12) shows the mean refractive index measured by ellipsometer, at 632.8 nm,
number of times measured (population), and standard deviation (SD) for fluorotellurite
glasses studied.
Table (6.12): Mean refractive index at measured by ellipsometer, 632.8 nm, number of
times measured (population), and standard deviation (SD) for fluorotellurite glasses (see
table (3.2)).
MOF
Glass ID
Refractive index,
n, at 632.8 nm
Population SD
004 1.85020 5 0.00179
001 1.88740 5 0.00195
005 1.91440 5 0.00195
006 1.94660 5 0.00152
007 1.99040 5 0.00134
008 2.02040 5 0.00207
009 1.91500 3 0.00200
010 1.91200 3 0.00265
011 1.92367 3 0.00115
012 1.95200 3 0.00361
013 1.95167 3 0.00153
Variability in values was less for these glasses compared to the oxide compositions
(table (6.11)). Glasses MOF001, 004 to 008 were part of the series (90-x)TeO2-10Na2O-
xZnF2 mol. %, for 5 ≤ x ≤ 30 mol. %. Fig. (6.48) shows the variation in refractive index
at 633 nm with ZnF2 content [5]. The error bars represent +3σ (i.e. 99.7 % confidence
intervals).