Tellurite And Fluorotellurite Glasses For Active And Passive

6. Optical properties; MDO 204
Loss / dB.m -1
800
700
600
500
400
300
200
100
0
1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
Melting time / hours
Fig. (6.28): Variation of OH band height at around 2900 cm -1 with increasing melting
time for glass MOF001 (65TeO2-10Na2O-25ZnF2 mol. %) [5].
It can be seen that absorption due to OH bands in the glass decreased with increasing
melting time, and were as low as 10 dB.m -1 after 2 hours, around seven times lower than
for 1 hour of melting (705 dB.m -1 ).
Fig. (6.29) to (6.34) show the Gaussian deconvolution of the OH bands for glasses of
the series (90-x)TeO2-10Na2O-xZnF2, mol. %, for 5 ≤ x ≤ 30 mol. % (glasses MOF001,
004 to 008).