In this paper, we demonstrate, numerically and experimentally that using the mask-lens setup used by Durnin to generate Bessel beams Durnin [Phys. Rev. Lett. 58, 1499 (1987)], it is possible to generate different kinds of propagation invariant beams. A modification in the amplitude or phase of the field that illuminates the annular slit is proposed that corresponds to modulation in frequency space. In particular, we characterize the new invariant beams that were obtained by modulating the amplitude of the annular mask and when the incident field was modulated with a one-dimensional quadratic or cubic phase. Experimental results using an amplitude mask are shown in order to corroborate the numerical predictions.

中文翻译：

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频率空间幅度和相位调制获得的新的非对称传播不变光束


在本文中，我们通过数值和实验证明了使用杜宁使用的掩模透镜设置来生成贝塞尔光束莱特牧师。 58, 1499 (1987)]，可以产生不同种类的传播不变光束。提出了对照射环形狭缝的场的幅度或相位的修改，其对应于频率空间中的调制。特别是，我们表征了通过调制环形掩模的振幅以及当用一维二次或三次相位调制入射场时获得的新的不变光束。显示使用振幅掩模的实验结果以证实数值预测。