A. V. Volyar, S. I. Khalilov, M. V. Bretsko, Ya. E. Akimova, Yu. A. Egorov
{"title":"Measuring Singularities of Vector Structured LG Beams and Stokes Vortices via Intensity Moments Technique","authors":"A. V. Volyar, S. I. Khalilov, M. V. Bretsko, Ya. E. Akimova, Yu. A. Egorov","doi":"10.3103/S1060992X23050193","DOIUrl":null,"url":null,"abstract":"<p>We theoretically and experimentally investigated the transformation processes of polarization singularities (C-points, L-lines, V-points and rings, as well as the Stokes vortices) in vector structured Laguerre–Gaussian (<b>sLG</b>) beams with varying their controllable phase parameters. It was shown that all the Stokes vortices simultaneously turn to zero only in V-points and rings, in other polarization singularities only a part of the Stokes vortices vanish. On the basis of our computer simulation, the process of the birth and annihilation of polarization singularities has been studied. In the experiment, we used the intensity moments technique for the first time to measure the spectrum of vector modes and their digital multiplexing of a simple vector <b>sLG</b><sub>12</sub> beam. The amplitude and phase spectra were measured in each linear polarized component of the space-variant polarization field. Then scalar fields of the polarization components were formed, which was the digital demultiplexing of the vector <b>sLG</b> field. The combination of the vector modes made it possible to restore the vector <b>sLG</b> beam again, that is the digital multiplexing the vector field.</p>","PeriodicalId":721,"journal":{"name":"Optical Memory and Neural Networks","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optical Memory and Neural Networks","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.3103/S1060992X23050193","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
We theoretically and experimentally investigated the transformation processes of polarization singularities (C-points, L-lines, V-points and rings, as well as the Stokes vortices) in vector structured Laguerre–Gaussian (sLG) beams with varying their controllable phase parameters. It was shown that all the Stokes vortices simultaneously turn to zero only in V-points and rings, in other polarization singularities only a part of the Stokes vortices vanish. On the basis of our computer simulation, the process of the birth and annihilation of polarization singularities has been studied. In the experiment, we used the intensity moments technique for the first time to measure the spectrum of vector modes and their digital multiplexing of a simple vector sLG12 beam. The amplitude and phase spectra were measured in each linear polarized component of the space-variant polarization field. Then scalar fields of the polarization components were formed, which was the digital demultiplexing of the vector sLG field. The combination of the vector modes made it possible to restore the vector sLG beam again, that is the digital multiplexing the vector field.
期刊介绍:
The journal covers a wide range of issues in information optics such as optical memory, mechanisms for optical data recording and processing, photosensitive materials, optical, optoelectronic and holographic nanostructures, and many other related topics. Papers on memory systems using holographic and biological structures and concepts of brain operation are also included. The journal pays particular attention to research in the field of neural net systems that may lead to a new generation of computional technologies by endowing them with intelligence.