Transparent Tb2Ti2O7 ceramics for use in Faraday isolators

IF 2.9 Q1 MATERIALS SCIENCE, CERAMICS

Open Ceramics Pub Date : 2024-08-26 DOI:10.1016/j.oceram.2024.100662

I.L. Snetkov , K.V. Sidorenko , O.V. Palashov , Lixuan Zhang , Jiang Li

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Abstract

Magneto-optical and thermo-optical characteristics of transparent Tb₂Ti₂O₇ ceramics were investigated. The dependence of the index of refraction on the wavelength in the 0.29–2 μm range, the wavelength and temperature dependence of the Verdet constant, as well as the dependence of thermally induced depolarization on laser radiation power were measured. The value of the Verdet constant in Tb₂Ti₂O₇ surpasses that in Tb₃Ga₅O₁₂ by more than 1.68 times. The thermo-optical characteristic Q_eff was estimated to be (1.8–3.7)∙10⁻⁸ 1/K, which is record small compared to Q_eff of the known magneto-optical materials. The small value of Q_eff makes Tb₂Ti₂O₇ a highly promising magneto-optical material for Faraday isolators and rotators for high average power lasers.

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用于法拉第隔离器的透明 Tb2Ti2O7 陶瓷

研究了透明 Tb2Ti2O7 陶瓷的磁光和热光特性。测量了折射率在 0.29-2 μm 波长范围内对波长的依赖性、Verdet 常数对波长和温度的依赖性以及热诱导去极化对激光辐射功率的依赖性。Tb2Ti2O7 的 Verdet 常数值是 Tb3Ga5O12 的 1.68 倍以上。据估计，热光学特性 Qeff 为 (1.8-3.7)∙10-8 1/K，与已知磁光材料的 Qeff 相比，这个数值小得惊人。较小的 Qeff 值使得 Tb2Ti2O7 成为一种非常有前途的磁光材料，可用于高平均功率激光器的法拉第隔离器和旋转器。

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来源期刊

Open Ceramics Materials Science-Materials Chemistry

CiteScore

4.20

自引率

0.00%

发文量

102

审稿时长

67 days