Table 1 Tg, Tx, ΔT, density, Er3+ ion concentration and the polarizability at 1538 nm values of the glass samples.

From: The role of tungsten oxide in Er3+-doped bismuth-germanate glasses for optical amplification in L-band

Sample

Tg (± 3 °C)

Tx (± 3 °C)

ΔT (± 6 °C) (Tx–Tg)

Glass Density (± 0.01 g/cm3)

Er3+ ion concentration (\(\times\) 1020 ions/cm3)

Polarizability at 1538 nm (\(\times\) 10–24)

5W

493

706

213

6.04

1.78

6.44

10W

495

607

112

6.16

1.76

6.53

15W

501

584

83

6.35

1.74

6.83

20W

496

582

86

6.51

1.73

6.97

25W

497

580

83

6.63

1.72

7.14

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