Tellurite And Fluorotellurite Glasses For Active And Passive

Percentage (%)
80
70
60
50
40
30
20
10
6. Optical properties; MDO 196
0
Strong OH Weak OH Free OH
OH type
MOD007 (12 mol. % ZnO) MOD013 (10 mol. % ZnO)
Fig. (6.18): Percentage of OH groups in glass series (90-x)TeO2-10Na2O-xZnO mol. %,
for MOD007 (x = 12 mol. % ZnO), MOD013 (x = 10 mol. % ZnO).
It can be seen that the amount of each type of OH in glass MOD007 (12 mol. % ZnO)
and 2.98 mm MOD013 (10 mol. % ZnO) is approximately the same.
Infrared spectroscopy of WO3 containing glasses
Fig. (6.19) shows infrared spectra of glasses MOD014 (90TeO2-5WO3-5Nb2O5 mol. %),
MOD015 (82.5TeO2-7.5WO3-10Nb2O5 mol. %), and MOD016 (70TeO2-25WO3-5Bi2O3
mol. %). It can be seen that the multiphonon-edge moves to a higher wavenumber with
increasing WO3 content. The edge also develops an absorption band which increases in
intensity with increasing WO3. Fig. (6.20) shows the multiphonon-edges in detail.