Lü B, Ma H
Institute of Laser Physics and Laser Technology, Sichuan University, Chengdu 610064, China.
Appl Opt. 2000 Mar 10;39(8):1279-89. doi: 10.1364/ao.39.001279.
A detailed study of the coherent and the incoherent combinations of two-dimensional off-axis Hermite-Gaussian beams with rectangular symmetry is made. The closed-form propagation formulas of the resulting beam are derived, and the resulting beam quality in terms of the M(2) factor and power in the bucket is discussed and compared for the coherent and the incoherent combinations. In addition, it is shown that the resulting astigmatic beam can be symmetrized in the sense of the second-moment definition of beam width. However, the symmetrizing transformation of the resulting astigmatic beams is incomplete, because there exist different irradiance profiles.
对具有矩形对称性的二维离轴厄米 - 高斯光束的相干和非相干组合进行了详细研究。推导了合成光束的闭式传播公式，并针对相干和非相干组合，讨论并比较了合成光束在M²因子和桶中功率方面的光束质量。此外，结果表明，从光束宽度的二阶矩定义的意义上讲，合成的像散光束可以实现对称化。然而，合成像散光束的对称化变换并不完全，因为存在不同的辐照度分布。
