Preparation and Performance of Magneto-optical Glasses Doped with Tb3＋/Dy3＋

In order to increase the content of rare-earth oxides in magneto-optical glass and improve the Verdet constant, the rare-earth doped ternary Ga2O3-B2O3-SiO2(GBS) system magneto-optical glasses were prepared by the melt quenching technique. The infl uence of Tb3+ and Dy3+ ions on the structure of GBS glasses was investigated using FTIR, DSC and Faraday rotations. The experimental results showed that the content of rare-earth oxides in the glasses with the double incorporation of Tb2O3 and Dy2O3 was higher. The crystallization parameter β achieved the maximum 0.48 with Tb3+/Dy3+ content of 35mol%. Terbium oxide existed mainly in [TbO3] units in the glasses and [TbO4] units were converted into [TbO3] with increasing Tb2O3 content. As Ga3+ ion is larger than B3+ ion in radius, leading to an increasing of the glass network gap and improvement in the ability of accommodating rare earth ions, Verdet constant increased.

Preparation and performance of magneto-optical glasses doped with Tb3+/Dy3+

In order to increase the content of rare-earth oxides in magneto-optical glass and improve the Verdet constant, the rare-earth doped ternary Ga₂O₃-B₂O₃-SiO₂(GBS) system magneto-optical glasses were prepared by the melt quenching technique. The influence of Tb³⁺ and Dy³⁺ ions on the structure of GBS glasses was investigated using FTIR, DSC and Faraday rotations. The experimental results showed that the content of rare-earth oxides in the glasses with the double incorporation of Tb₂O₃ and Dy₂O₃ was higher. The crystallization parameter β achieved the maximum 0.48 with Tb³⁺/Dy³⁺ content of 35mol%. Terbium oxide existed mainly in [TbO₃] units in the glasses and [TbO₄] units were converted into [TbO₃] with increasing Tb₂O₃ content. As Ga³⁺ ion is larger than B³⁺ ion in radius, leading to an increasing of the glass network gap and improvement in the ability of accommodating rare earth ions, Verdet constant increased.