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Structural property of bismuth-doped tellurite glasses for nonlinear and Raman fiber applications

机译：非线性和拉曼纤维应用中铋掺杂碲酸盐玻璃的结构特性

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摘要

A series of 75TeO(2)-(20-x)ZnO-5Na(2)O-xBi(2)O(3) (mol%) glasses with x = 0, 6, 8, and 10 (TZN-Bi) were fabricated via the special melt-quench technique and characterized as candidates for fiber laser glasses. Optical absorption studies revealed that increasing the Bi2O3 content increased the cutoff wavelength and Urbach energy (Delta E) and decreased the optical band gap energy (E-opt): these trends were attributed to the structural changes occurring in these glasses. In addition to optimizing the linear transmittance and absorption, Bi2O3 increased the nonlinear refractive indexes and the Raman gain coefficients. The TZN-Bi glasses exhibited large third-order optical nonlinearities with a maximum n(2) of 2.85 x 10(-15) cm(2)/W. The peak Raman gain coefficients (29 x 10(-11) cm/W) were approximately 30 times that of SiO2. These results indicate that the Bi2O3-modified glasses are promising candidates in optical applications such as Q-switching elements and Raman gain amplifiers. (C) 2019 Elsevier B.V. All rights reserved.
机译：一系列的75TeO（2）-（20-x）ZnO-5Na（2）O-xBi（2）O（3）（mol％）玻璃，x = 0、6、8和10（TZN-Bi）通过特殊的熔融淬火技术制造而成，可作为光纤激光玻璃的候选材料。光吸收研究表明，增加Bi2O3含量会增加截止波长和Urbach能量（Delta E），并降低光学带隙能量（E-opt）：这些趋势归因于这些玻璃中发生的结构变化。除了优化线性透射率和吸收率外，Bi2O3还增加了非线性折射率和拉曼增益系数。 TZN-Bi玻璃具有较大的三阶光学非线性，最大n（2）为2.85 x 10（-15）cm（2）/ W。峰值拉曼增益系数（29 x 10（-11）cm / W）约为SiO2的30倍。这些结果表明，Bi2O3修饰的玻璃在诸如Q开关元件和拉曼增益放大器的光学应用中是有希望的候选者。 （C）2019 Elsevier B.V.保留所有权利。

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