Martynyuk-Lototska Iryna, Mys Oksana, Dudok Taras, Mytsyk Bohdan, Demyanyshyn Natalya, Kostyrko Myroslav, Adamenko Dmitro, Trubitsyn Mikhaylo, Vlokh Rostyslav
Appl Opt. 2020 Aug 1;59(22):6717-6723. doi: 10.1364/AO.398218.
We determine full matrices of piezo-optic and elasto-optic coefficients for lead germanate crystals, , using Dixon-Cohen and interferometric methods. Two different types of samples are studied, single- and multi-domain. We show that the correct data for the crystals can be obtained only with single-domain samples, since the domain structure induces a number of features that make the final results unreliable. We demonstrate that the acousto-optic figures of merit reach high-enough values at the isotropic acousto-optic interactions with longitudinal acoustic waves propagating along the principal and axes (63×10 and 37×10/), respectively. At the same time, the efficiency of the acousto-optic interactions with transverse acoustic waves is low. The same is true concerning anisotropic acousto-optic diffraction, since the appropriate elasto-optic coefficients are small enough.
我们使用狄克逊 - 科恩法和干涉测量法确定了锗酸铅晶体（ ）的光弹和弹光系数的完整矩阵。研究了两种不同类型的样品，即单畴和多畴样品。我们表明，只有使用单畴样品才能获得 晶体的正确数据，因为畴结构会引发许多特性，使得最终结果不可靠。我们证明，在沿主 轴和 轴传播的纵向声波的各向同性声光相互作用中，声光品质因数分别达到足够高的值（63×10 和 37×10 / ）。同时，与横向声波的声光相互作用效率较低。对于各向异性声光衍射也是如此，因为相应的弹光系数足够小。
