Optical properties and radiative rates of cadmium lithium gadolinium silicate glasses (CLGS) doped with Er³⁺ are presented. Direct energy gap and its dependence refractive indexes are estimated and presented, as well. We have derived absorption and emission cross-sections and then the estimated possible spectral optical gain for different concentrations of Er³⁺ at 1 mol%, 1.5 mol%, and 2 mol% are also evaluated. For the three NIR peaks at 800 nm, 1 μm and 1.5 μm, the effect of dopant concentrations on the emission cross section and optical gain factors are investigated. The quenching behaviour occurred in the emission/absorption cross sections as well as optical gain for higher dopant level and at a wavelength of 1 μm is discussed. The present glasses doped with 1.5 mol% and 2 mol% of Er₂O₃ show higher emission cross sections values at 1.5 μm, the estimated emission cross sections rapidly increased by about of 40% at 1.5 μm of the glass samples doped with 1.5 mol%, and 2 mol% of Er₂O₃. This increase reflected on the gain factors which show higher values of the same samples at 1.5 μm by $~7-9$ ${\text{cm}}^{-1}$

介绍了掺有Er ³⁺的镉硅酸锂lithium锂玻璃的光学性质和辐射速率。还估计并给出了直接能隙及其相关的折射率。我们得出了吸收和发射截面，然后估算了不同浓度的Er ^3+的可能的光谱光学增益还评估了1mol％，1.5mol％和2mol％的α，β，α，β，β，β，β，β，β，β，β。对于在800 nm，1μm和1.5μm处的三个NIR峰，研究了掺杂剂浓度对发射截面和光学增益因子的影响。讨论了在发射/吸收截面中发生的猝灭行为以及更高掺杂水平和波长为1μm时的光学增益。掺杂有1.5 mol％和2 mol％的Er ₂ O ₃的本玻璃在1.5μm处显示出更高的发射截面值，在1.5μm掺杂有1.5 mol的玻璃样品中，估计的发射截面迅速增加了约40％。 ％和2mol％的Er ₂ O ₃。这种增加反映在增益因子上，该因子在1.5μm处显示出相同样品的更高值。$〜7-9$ ${\text{厘米}}^{-\mathrm{1个}}$