Correction of shape distortions in laser beams apodized with circular serrated apertures

Sizova I; Moskalev T.; Stavrovskii D.

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Correction of shape distortions in laser beams apodized with circular serrated apertures

机译：用圆形锯齿状的激光束中的形状扭曲校正

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Flat-top laser beams produced with apodizers comprising a circular serrated aperture and spatial filter are not optimal for propagation over long distances. Residual intensity fluctuations across the overall smooth profile at the apodizer exit significantly accelerate degradation of the beam at small Fresnel numbers. By solving the parabolic equation for uniformandGaussian beams propagating through a serrated aperture apodizer, we showthat a narrow opaque ring installed inside the serrated aperture can largely suppress unwanted diffraction effects and bring the output amplitude profile close to the flattened Gaussian function. With this correction, the usable propagation distance of the apodized beam can be extended to Fresnel numbers N-F approximate to 2 . . . 5. (C) 2021 Optical Society of America

机译：由锯齿形光圈和空间滤波器组成的变迹器产生的平顶激光束对于长距离传播来说不是最佳的。在小菲涅耳数情况下，切趾器出口处整个平滑轮廓上的剩余强度波动会显著加速光束的退化。通过求解均匀高斯光束通过锯齿光阑变迹器传输的抛物线方程，我们证明在锯齿光阑内安装一个窄的不透明环可以很大程度上抑制不必要的衍射效应，并使输出振幅分布接近平顶高斯函数。通过这种校正，变迹光束的可用传输距离可以扩展到菲涅耳数N-F，约为2。5、（c）美国2021光学学会

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《Applied optics》 |2021年第16期|共10页
作者
Sizova I; Moskalev T.; Stavrovskii D.;
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Russian Acad Sci Lebedev Phys Inst 53 Leninsky Prospect Moscow 119991 Russia;

Russian Acad Sci Lebedev Phys Inst 53 Leninsky Prospect Moscow 119991 Russia;

Russian Acad Sci Lebedev Phys Inst 53 Leninsky Prospect Moscow 119991 Russia;

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机译：用圆形锯齿状孔形成激光束。 II。梁轮廓形成的理论
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9. Applying of refractive beam shapers of circular symmetry to generate non-circular shapes of homogenized laser beams [C] . Alexander Laskin, Vadim Laskin Laser resonators and beam control XIII . 2011

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10. Focusing, wavelength tuning, beam steering and beam shaping of circular grating surface emitting distributed Bragg reflector lasers. [D] . Penner, Robert Scott. 1999

机译：圆形光栅表面发射分布式布拉格反射器激光器的聚焦，波长调谐，光束控制和光束整形。
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机译：圆形光栅表面发射分布式布拉格反射器激光器的聚焦，波长调谐，光束控制和光束整形
13. Serrated Circular Apertures: Optical Fourier Transforms and Fractal Analysis. [R] . Beal, M. M. 1990

机译：锯齿形圆孔：光学傅里叶变换和分形分析。

Correction of shape distortions in laser beams apodized with circular serrated apertures

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