Abstract

The temperature, spectral and baric dependences of birefringence Δn_i of potassium sulfate crystals doped with 1.7% of copper are studied. It is established that the impurity introduction changes an absolute value of Δn_i and leads to an increase of the temperature dependence Δn_і(Т). It is shown that the isotropic points, which are shifted towards low temperatures by 5 and 11 K, respectively, compared to a pure crystal, appear in a doped potassium sulfate crystal. It is established that uniaxial stresses change the magnitude of absolute values of Δn_i, as well as the domain of existence of the isotropic state. The generalized temperature–spectral–baric diagrams of the isotropic state of a doped potassium sulfate crystal are plotted, which make it possible to use them as a crystallooptic sensor.

中文翻译：

---

K 2 SO 4杂质晶体的各向同性点

摘要

温度，光谱和双折射Δ的气压的依赖性Ñ_我掺杂有铜的1.7％的钾的硫酸盐结晶的进行了研究。已经确定，在杂质导入变化Δ的绝对值Ñ_我和导致增加的温度依赖性Δ的Ñ _і（Т）。结果表明，与纯晶体相比，各向同性点分别向着低温偏移了5 K和11 K，出现在掺杂的硫酸钾晶体中。已经确定，单轴应力会改变Δn _i的绝对值的大小，以及各向同性状态的存在域。绘制了掺杂的硫酸钾晶体各向同性状态的广义温度-光谱-恒压图，这使得将它们用作晶体回路传感器成为可能。