Conoscopic interference patterns, channelled spectra and polarimetric techniques have been used for the characterization of pure and doped (with l‐arginine amino acid) potassium dihydrogen phosphate (KDP) single crystals. Experimental polarimetric data have been obtained for the frequently used wavelength of 633 nm and for two close wavelengths of 532 and 543 nm in a high‐accuracy dual‐wavelength polarimeter. The measurement of eigenwave ellipticity in the [100] and [010] directions and between 295 and 340 K shows small differences in the absolute values of the specific optical rotations of KDP crystals doped with l‐arginine in the range of 0.7–3.8 wt%. It is found that the gyration tensor component g₁₁, specific optical rotation and eigenwave ellipticity show different dispersion in the visible spectral region.

中文翻译：

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左旋精氨酸掺杂的磷酸二氢钾单晶体的极化研究

锥光干涉图案，槽形光谱和极化技术已被用于纯表征和掺杂（用升精氨酸氨基酸）磷酸二氢钾（KDP）单晶体。在高精度双波长旋光仪中，获得了常用波长为633 nm以及两个近波长532和543 nm的实验偏振数据。在[100]和[010]方向以及在295和340 K之间的本征波椭圆率的测量结果表明，掺有l-精氨酸的KDP晶体的比旋光度的绝对值在0.7-3.8 wt％的范围内存在很小的差异。发现回转张量分量g ₁₁，特定的旋光度和本征波椭圆率在可见光谱区域显示出不同的色散。