Table 3.

CIE chromaticity coordinates of glass samples annealed at 320 °C and 650 °C (the codes match as shown in Fig. 8).

Sample	Code	CIE coordinates
		x	y
0.5% Er2O3 glass at 320 °C	A	0.240	0.474
1% Er2O3 glass at 320 °C	B	0.263	0.460
0.5% Er2O3 glass at 650 °C	C	0.267	0.450
1% Er2O3 glass at 650 °C	D	0.260	0.426
0.5% Tb2O3 glass at 320 °C	E	0.294	0.450
1% Tb2O3 glass at 320 °C	F	0.279	0.473
0.5% Tb2O3 glass at 650 °C	G	0.300	0.501
0.5%Tb2O3 glass at 650 °C	H	0.298	0.543