Helicity inversion of the scattered twisted light field using pilot-assisted laser light and Stokes correlation

IF 3.5 2区工程技术 Q2 OPTICS

Optics and Lasers in Engineering Pub Date : 2025-05-28 DOI:10.1016/j.optlaseng.2025.109094

Tushar Sarkar , Sourav Chandra , Jiapeng Cai , Xiang Peng , Wenqi He

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Abstract

We propose and experimentally demonstrate a new method to directly invert the helicity of the twisted beam propagating through a scattering media. This is implemented by leveraging a pilot-assisted laser light and a special finding regarding the higher-order Stokes correlation. Here, the pilot-assisted strategy refers to coaxial light propagation through a scattering media in which one of the orthogonal polarization bases is encoded with the twisted beam while another polarization basis is free from it. Such a strategy eliminates the path-induced randomness in the higher-order Stokes correlation owing to the identical randomness presented in both orthogonal polarization bases, preserving the incident twisted beam. The recovery and inversion of the helicity are accomplished by measuring the higher-order Stokes correlation of the scattered light. A detailed theoretical framework is developed and supported by numerical simulation followed by experimental tests.

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利用导航辅助激光和Stokes相关反演散射扭曲光场的螺旋度

我们提出并实验证明了一种直接反演扭曲光束在散射介质中传播的螺旋度的新方法。这是通过利用导航辅助激光和一个关于高阶斯托克斯相关的特殊发现来实现的。在这里，导航辅助策略是指同轴光通过散射介质传播，其中一个正交偏振基被扭曲光束编码，而另一个偏振基不被扭曲光束编码。该策略消除了高阶Stokes相关中路径引起的随机性，因为两个正交偏振基呈现相同的随机性，从而保留了入射扭曲光束。螺旋度的恢复和反演是通过测量散射光的高阶斯托克斯相关来实现的。建立了详细的理论框架，并通过数值模拟和实验测试加以支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics and Lasers in Engineering 工程技术-光学

CiteScore

8.90

自引率

8.70%

发文量

384

审稿时长

42 days

期刊介绍： Optics and Lasers in Engineering aims at providing an international forum for the interchange of information on the development of optical techniques and laser technology in engineering. Emphasis is placed on contributions targeted at the practical use of methods and devices, the development and enhancement of solutions and new theoretical concepts for experimental methods. Optics and Lasers in Engineering reflects the main areas in which optical methods are being used and developed for an engineering environment. Manuscripts should offer clear evidence of novelty and significance. Papers focusing on parameter optimization or computational issues are not suitable. Similarly, papers focussed on an application rather than the optical method fall outside the journal''s scope. The scope of the journal is defined to include the following: -Optical Metrology- Optical Methods for 3D visualization and virtual engineering- Optical Techniques for Microsystems- Imaging, Microscopy and Adaptive Optics- Computational Imaging- Laser methods in manufacturing- Integrated optical and photonic sensors- Optics and Photonics in Life Science- Hyperspectral and spectroscopic methods- Infrared and Terahertz techniques