Tellurite And Fluorotellurite Glasses For Active And Passive

6. Optical properties; MDO 220
6.2.2. Refractive index (ellipsometry)
6.2.2.1. Refractive index of oxide tellurite glasses
Table (6.11) shows the mean refractive index measured by ellipsometer, at 632.8 nm, the
number of times measured (population), and standard deviation (SD) for oxide tellurite
glasses studied.
Table (6.11): Mean refractive index measured by ellipsometer, at 632.8 nm, number of
times measured (population), and standard deviation (SD) for oxide tellurite glasses (see
table (3.1)).
MOD
glass ID
Refractive index,
n, at 632.8 nm
Population SD
007 2.02093 15 0.00144
010 2.02364 25 0.00298
012 1.99160 15 0.01344
014 2.14687 15 0.00828
015 2.15160 15 0.01007
016 2.15693 15 0.00825
Variability in the refractive indicies can result from a number of factors such as
inhomogeneity in the sample, surface degradation, and quality of the polish. Rare-earth
doping can also result in disparate data due to complex polarisation and absorption
behaviour.