Real-Time Phase Conjugation of Vector Vortex Beams,ACS Photonics

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Real-Time Phase Conjugation of Vector Vortex Beams
ACS Photonics ( IF 6.5 ) Pub Date : 2020-01-07 , DOI: 10.1021/acsphotonics.9b01524
André G. de Oliveira ₁ , Marcelo F. Z. Arruda _{1,

2} , Willamys C. Soares ₃ , Stephen P. Walborn ₄ , Rafael M. Gomes ₅ , Renné Medeiros de Araújo ₁ , Paulo H. Souto Ribeiro ₁

Affiliation

Vector vortex beams have played a fundamental role in the better understanding of coherence and polarization. They are described by spatially inhomogeneous polarization states, which present a rich optical mode structure that has attracted much attention for applications in optical communications, imaging, spectroscopy, and metrology. However, this complex mode structure can be quite detrimental when propagation effects such as turbulence and birefringence perturb the beam. Optical phase conjugation has been proposed as a method to recover an optical beam from perturbations. Here we demonstrate full phase conjugation of vector vortex beams using three-wave mixing. Our scheme exploits a fast nonlinear process that can be conveniently controlled via the pump beam. Our results pave the way for sophisticated, practical applications of vector beams.

中文翻译：

矢量涡旋光束的实时相位共轭

矢量涡旋光束在更好地了解相干性和极化方面起着基本作用。它们通过空间不均匀的偏振态来描述，偏振态呈现出丰富的光学模式结构，在光通信，成像，光谱学和计量学中的应用引起了人们的广泛关注。但是，当诸如湍流和双折射之类的传播效应干扰光束时，这种复杂的模式结构可能会非常有害。已经提出了光相位共轭作为从微扰中恢复光束的方法。在这里，我们演示了使用三波混合的矢量涡旋光束的全相位共轭。我们的方案利用了可以通过泵浦光束方便地控制的快速非线性过程。我们的结果为矢量束的复杂，实际应用铺平了道路。

更新日期：2020-01-07

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