论文部分内容阅读
钽铌酸钾(KTN)晶体作为一种性能优良的多功能晶体,具有显著的二次电光效应。在应用该晶体进行电光调制实验的过程中,发现了一种基于该晶体的电控双折射效应。为了对这种电控光束偏转分离现象做出合理的解释,运用KTN晶体的二次电光效应原理和菲涅耳方程建立了光束分离偏转的数学模型,从理论上阐明了该现象产生的原因,给出了非寻常光的偏转角度与电压及光束入射角之间的函数关系。并进一步通过实验测量了KTN晶体的电控双折射现象,对相应理论进行了实验验证。实验结果表明在532nm激光斜入射的情况下,KTN晶体具有明显的电控双折射效应和较大的非寻常光偏转角。
As a multifunctional crystal with good performance, tantalum potassium niobate (KTN) crystal has significant secondary electro-optic effect. In the process of electro-optic modulation using the crystal, an electronically controlled birefringence effect based on the crystal was found. In order to give a reasonable explanation of the deflection phenomenon of the electronically controlled beam, the mathematic model of the separation and deflection of the beam is established by using the principle of the secondary electro-optic effect of KTN crystal and the Fresnel equation, and the reason of the phenomenon is clarified theoretically. The relationship between the deflection angle of extraordinary light and voltage and incident angle of light beam is given. Furthermore, the phenomenon of electronically controlled birefringence of KTN crystal was further measured experimentally, and the corresponding theory was verified experimentally. The experimental results show that the KTN crystal has a significant electronically controlled birefringence effect and a large extraordinary light deflection angle under 532 nm laser oblique incidence.