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在广义Mie散射理论的基础上,研究了离轴球型粒子对TEM00基模高斯激光束的散射特性,依据高斯波束在球坐标系的展开形式,对展开系数的有限级数解形式进行了编程计算;模拟了高斯光束在离轴球型粒子散射的情况下,散射光强与粒径参数、折射率、散射角和散射粒子相对位置的关系;对模拟结果进行了讨论,并与平面波的散射规律进行了对比分析。结果显示:高斯光束的散射光强分布呈现出了与平面波散射不同的规律,但在大束腰半径条件下,与平面波的散射规律有许多共同之处。
Based on the generalized Mie scattering theory, the scattering properties of off-axis spherical particles on the TEM00 fundamental Gaussian laser beam are studied. According to the expanded form of the Gaussian beam in the spherical coordinate system, the finite-series solution of the expansion coefficient is programmed The relationship between the scattering intensity and the particle size parameter, refractive index, scattering angle and the relative position of the scattering particles is simulated. The simulation results are discussed and compared with the scattering of the plane wave The laws were compared. The results show that the scattered light intensity distribution of Gaussian beam presents a different law from that of plane wave scattering. However, the scattering law of plane wave has much in common with the large beam waist radius.