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基于光束在单轴晶体中的傍轴矢量传输理论,对双曲正弦平方-高斯光束在单轴各向异性晶体中垂直于光轴的传输做了研究,得到了一般的解析传输公式,并用数值计算方法分析了该光束的传输特性。研究表明:由于晶体的各向异性,其原来的偏振特性将不再保持,仅沿x方向偏振的初始场分量衍生出y分量;随着传输距离的增加,非寻常光沿x轴和z轴的偏振场慢变振幅均减小,光强峰值也随之减小。此外,双曲正弦平方-高斯光束在单轴晶体中垂直于光轴传输时,光束参数β取值不同,光强呈现不同的分布状态。
Based on the theory of paraxial vector transmission of light beams in uniaxial crystals, the transmission of hyperbolic sine-squared-Gaussian beams perpendicular to the optical axis in uniaxial anisotropic crystals was studied. The general analytic transmission equation was obtained, The calculation method analyzes the transmission characteristics of the beam. The results show that due to the anisotropy of the crystal, the original polarization property will not be maintained, and the y component is only derived from the initial field component of the polarization in the x direction. As the transmission distance increases, the extraordinary light propagates along the x- and z-axes The amplitude of slow polarization of the polarization field decreases, and the peak of light intensity decreases. In addition, when the hyperbolic sine-squared-Gaussian beam propagates perpendicularly to the optical axis in a uniaxial crystal, the beam parameters β have different values and the light intensity shows different distributions.