Abstract Glasses, with composition 10Na2O–10Bi2O3–20B2O3–(60-x)SiO2: Cr2O3 (0 ≤ x ≤ 0.25), synthesized by melt quenching procedure were characterized by XRD and conducted optical absorption, EPR, and FTIR spectroscopic techniques. The optical absorption spectra portrayed a strong absorption peak at about 642 nm owing to 4A 2g → 4 T 2g (F) with a couple of envelopes at about 681 and 712 nm due to 4A 2g → 2 T 1g and 4A 2g → 2 E g transitions, respectively. All doped samples showed two EPR signals, each at low and high magnetic fields caused by the chromium ion isolation and interchange interactions of Cr3＋-Cr3＋ ions, respectively. FTIR spectra have revealed the behaviour of various structural units for different concentration of Cr2O3 in the glass matrix. With the assistance of spectroscopic studies, the observed fall in the rigidity of the samples with higher concentrations of Cr2O3 is attributed to presence of high concentrations of octahedrally resided Cr3＋ ions, which gain more suitability for lasing action.

中文翻译：

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铬离子对Na2O-Bi2O3-B2O3-SiO2玻璃体系光子适用性的影响

摘要 玻璃，由 10Na2O–10Bi2O3–20B2O3–(60-x)SiO2: Cr2O3 (0 ≤ x ≤ 0.25) 组成，通过 XRD 表征，并进行了光学吸收、EPR 和 FTIR 光谱技术。由于 4A 2g → 4 T 2g (F)，光吸收光谱在约 642 nm 处描绘了一个强吸收峰，由于 4A 2g → 2 T 1g 和 4A 2g → 2 E g 在约 681 和 712 nm 处有几个包络过渡，分别。所有掺杂的样品都显示出两个 EPR 信号，分别在由铬离子隔离和 Cr3＋-Cr3＋离子的交换相互作用引起的低磁场和高磁场下。FTIR 光谱揭示了玻璃基体中不同 Cr2O3 浓度的各种结构单元的行为。在光谱研究的帮助下，