有限能量Olver-Gaussian光束通过电光晶体的光强分布特性

Intensity Distribution of Finite Olver-Gaussian Through Electro-optical Crystal

基于广义惠更斯-菲涅耳积分公式,研究了傍轴近似下有限能量Olver-Gaussian光束经过铌酸锂电光晶体的光强分布特性。得出了这类光束经单轴晶体垂直于光轴的电场和光强解析式,基于此,探究了一阶Olver光束在电光晶体不同横截面上的光强分布和光波侧面传输光强图,并得出了外加电场和光波中心位置及中心光斑相对光强变化的定量关系;对传统三类单轴晶体的光波演变特性也进行了分析。

Paraxial transmission characteristic of a finite Olver-Gaussian beam(FOGB)in a LiNbO3 electro-optical crystal is investigated based on the generalized Huygens-Fresnel integral equation.The exact expression for the first-order FOGB passing through this electro-optical crystal orthogonal to the optical axis is derived.The contour graph of the FOGB intensity distribution on some transversal cross sections of the crystal,and the side view of this beam propagating evolution are discussed,respectively.The relation between external electric field and the central beam location,central relative beam intensity are also explored when wave propagating in the electro-optic crystal.Furthermore,the transmission characteristics of the FOGB in three kinds of traditional uniaxial crystal orthogonal to the optical axis are discussed as well.