Growth and properties of TSAG and TSLAG magneto-optical crystals with large size

Growth and properties of TSAG and TSLAG magneto-optical crystals with large size
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大尺寸TSAG和TSLAG磁光晶体的生长及性能

DOI:
10.1016/j.optmat.2019.109272
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发表时间:
2019-10
期刊:
影响因子:
3.9
通讯作者:
Sun Dunlu
Sun Dunlu
中科院分区:
材料科学3区
文献类型:
--
作者:
Dou Renqin;Zhang Haotian;Zhang Qingli;Zhuang Naifeng;Liu Wenpeng;He Yi;Chen Yingying;Cheng Maojie;Luo Jianqiao;Sun Dunlu

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用提拉法成功地生长出了尺寸为65 mm × 70 mm的大尺寸高透明TSAG和TSLAG单晶。TSAG和TSLAG在473、532、632.8和1064 nm处的折射率分别为1.9214 - 1.8817和1.9242 - 1.8841。他们的Sellmeier方程拟合。测量了TSAG和TSLAG在300 - 373 K、300 - 473 K、300 - 573 K、300 - 673 K和300 - 773 K的平均热膨胀系数。TSAG和TLSAG晶体的热膨胀系数值在测量误差范围内(相差0.3-0.4%)一致。TSAG和TSLAG的热扩散率值在300 K时分别为1.454和1.418 mm 2s − 1。根据比热计算结果,TSAG和TSLAG在300 K时的热导率分别为4.45和4.20 W(m K)− 1。此外,TSAG在532、633和1064 nm处的费尔德常数分别为218、152和65 rad/m/T,而TSLAG的费尔德常数分别为246、146和56 rad/m/T。进一步得到了TSAG和TSLAG的费尔德常数与波长的关系。
Large size high transparent TSAG and TSLAG single crystals of Ø 65 mm × 70 mm have been grown successfully by the Cz method. The refractive indices at 473, 532, 632.8 and 1064 nm are 1.9214 - 1.8817 for TSAG and 1.9242 - 1.8841 for TSLAG. Their Sellmeier equations are fitted. The average thermal expansion coefficients of TSAG and TSLAG at 300 – 373 K, 300 – 473 K, 300 – 573 K, 300 – 673 K, and 300 – 773 K are measured. The values of thermal expansion coefficients of TSAG and TLSAG crystals coincide within the measurement error (differ by 0.3–0.4%). The thermal diffusivity values of TSAG and TSLAG are 1.454 and 1.418 mm2s−1at 300 K, respectively. Calculated with the specific heat results, the values of thermal conductivity of TSAG and TSLAG are 4.45 and 4.20 W (m K)−1at 300 K. Moreover, the Verdet constants of TSAG are 218, 152, and 65 rad/m/T at 532, 633, and 1064 nm, while those of TSLAG are 246, 146, and 56 rad/m/T, respectively. In further, the relationships between Verdet constant and wavelength of TSAG and TSLAG are obtained.
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