Dispersive properties of alexandrite and beryllium hexaaluminate crystals
Dispersive properties of alexandrite and beryllium hexaaluminate crystals
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翠绿宝石和六铝酸铍晶体的色散特性
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
A. Major
中科院分区：
文献类型：
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作者：
P. Loiko;A. Major
掺Cr ~（3+）和Ti ~（3+）的金绿宝石（BeAl_2 O_4）和六铝酸铍（BeAl_6 O_（10））晶体在利用锁模振荡器产生少光周期的近红外超短激光脉冲方面具有很大的应用前景。这项工作提出了一个详细的研究这两种晶体的色散特性，这是必要的最佳色散控制在这样的激光器。推导了金绿宝石（Cr：BeAl_2O_4- Alexandrite）和BeAl_6O_（10）晶体的Sellmeier方程，分析了晶体的二阶和三阶色散特性（分别为GVD和TOD）。对双轴晶体的光轴位置和锥度角也作了预测，这对它们作为激光器和激光束整形器中的聚光元件具有实际意义。
The Cr3+- and Ti3+-doped crystals of chrysoberyl (BeAl2O4) and beryllium hexaaluminate (BeAl6O10) are very attractive for generation of near-IR ultrashort laser pulses in a few-optical-cycle regime from mode-locked oscillators. This work presents a detailed study of dispersive properties of both crystals, which is necessary for optimal dispersion control in such lasers. Sellmeier equations for the chrysoberyl (Cr:BeAl2O4 – Alexandrite) and BeAl6O10 crystals were derived and second- and third-order dispersive properties (GVD and TOD, respectively) were analyzed. Position of the optical axes and conicity angle were also predicted for these biaxial crystals which is of practical importance for their applications as conerefringent elements in lasers and laser beam shapers.