The effects of substitution of BaF₂ for BaO on physical properties and 1. 8 μm emission have been systematically investigated to improve spectroscopic properties in Tm³⁺ doped gallium tellurite glasses for efficient 2.0 μm fiber laser. It is found that refractive index and density gradually decrease with increasing BaF₂ content from 0 to 9 mol.%, due to the generation of more non-bridging oxygens. Furthermore, OH⁻ absorption coefficient (α_OH) reduces monotonically from 3.4 to 2.2 cm⁻¹ and thus emission intensity near 1.8 μm in gallium tellurite glass with 9 mol.% BaF₂ is 1.6 times as large as that without BaF₂ while the lifetime becomes 1.7 times as long as the one without BaF₂. Relative energy transfer mechanism is proposed. The maximum emission cross section and gain coefficient at around 1.8 μm of gallium tellurite glass containing 9 mol.% BaF₂ are 8.8 × 10⁻²¹ cm² and 3.3 cm⁻¹, respectively. These results indicate that Tm³⁺ doped gallium tellurite glasses containing BaF₂ appear to be an excellent host material for efficient 2.0 μm fiber laser development.

已经系统地研究了用Ba​​F ₂代替BaO对物理性能和1. 8μm发射的影响，以改善Tm ³⁺掺杂的碲化镓玻璃中有效2.0μm光纤激光器的光谱性能。发现由于BaF ₂含量从0增加到9mol。％，折射率和密度逐渐降低，这是由于产生了更多的非桥连氧。此外，OH ^-的吸收系数（α _OH）单调减少了从3.4至2.2厘米^-1，因此发光强度接近1.8微米的镓碲酸盐玻璃与9摩尔％的BaF。₂是1.6倍大，没有的BaF ₂而寿命是无BaF _2的1.7倍。提出了相对能量传递机理。包含9mol。％BaF ₂的镓碲玻璃的最大发射截面和在约1.8μm处的增益系数分别为8.8×10 ^-21 cm ²和3.3cm ^-1。这些结果表明，掺有BaF _2的Tm ³⁺掺杂的碲化镓玻璃似乎是有效的2.0μm光纤激光器开发的优良基质材料。