论文标题
通过合并的马切德和综合干涉法对光弹性材料的表征：应用于四方锂四锂晶体
Characterization of photoelastic materials by combined Mach-Zehnder and conoscopic interferometry: Application to tetragonal lithium tetraborate crystals
论文作者
论文摘要
Mach-Zehnder和构镜干涉法用于探索各向异性晶体材料的光弹性。在许多情况下，两种技术的应用都显着提高了压电和光弹性测量的准确性。例如，在四方锂四锂（LTB）单晶上证明了这种组合方法的性能。特别注意方法论和计量学方面，例如测量准确性以及对所得测量的定量误差分析。已经确定了对压电耦合不同几何形状的干涉测量值的整个LTB晶体的平压和光弹张量常数。另一方面，已经使用来自压电测量的光弹性常数的大小来评估大声型效率。对于具有强光弹性耦合LTB的几何形状，LTB表现出相当大的声音性能，具有功绩价值，$ m_2 $实现2.12 $ \ times $ 10 $^{ - 15} $ s $^3 $/kg。它的数量是硫晶晶体的几倍，如今，它是深紫外光谱区域中最好的声音材料。
Mach-Zehnder and conoscopic interferometry are used to explore photoelastic properties of anisotropic crystal materials. In a number of cases an application of both techniques significantly improves an accuracy of piezooptic and photoelastic measurements. The performance of such combined approach is demonstrated on tetragonal lithium tetraborate (LTB) single crystals, as an example. Special attention is paid to methodological and metrological aspects, such as measurement accuracy and the quantitative error analysis of the resulting measurements. Performing the interferometric measurements for different geometries of piezooptic coupling the full sets of piezooptic and photoelastic tensor constants of LTB crystals have been determined. The acoustooptic efficiency, on the other hand, has been evaluated using the magnitudes of photoelastic constants derived from the piezooptical measurements. For the geometries with strong photoelastic coupling LTB demonstrates quite large acoustooptic performance with figure of merit value , $M_2$ achieving 2.12 $\times$ 10$^{-15}$ s$^3$/kg. It is several times larger than that of strontium borate crystals, nowadays the best acoustooptic material in deep ultraviolet spectral region.
