{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,9]],"date-time":"2026-04-09T12:27:41Z","timestamp":1775737661441,"version":"3.50.1"},"reference-count":36,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2022,1,24]],"date-time":"2022-01-24T00:00:00Z","timestamp":1642982400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100002261","name":"Russian Foundation for Basic Research","doi-asserted-by":"publisher","award":["18-29-20045"],"award-info":[{"award-number":["18-29-20045"]}],"id":[{"id":"10.13039\/501100002261","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>We propose to achieve multichannel information transmission in free space by means of variously polarized beams. The interaction of vortex beams of various orders with the main polarization states is theoretically analyzed. The passage of beams with different polarization states through multi-order diffractive optical elements (DOEs) is simulated numerically. Using the simulation results, tables of code correspondence of diffraction order numbers to the presence of phase vortices in the analyzed beams are constructed, which allow one to determine diffraction orders that carry information about various polarization states. The performed experiment made it possible to study the recognition of the first order cylindrical polarization state formed by a Q-plate converter using a phase DOE. In the experiment, these elements were built into a commercial fiber-optic communication system operating at the near-IR frequencies. After detecting the beam polarization state, beams of the required diffraction orders are efficiently coupled into optical fiber using an additional phase element. The developed optical detection system also provides channel suppression of homogeneously polarized components, which are supposed to be used for transmission of other channels.<\/jats:p>","DOI":"10.3390\/s22030890","type":"journal-article","created":{"date-parts":[[2022,1,25]],"date-time":"2022-01-25T21:07:11Z","timestamp":1643144831000},"page":"890","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Free-Space Transmission and Detection of Variously Polarized Near-IR Beams Using Standard Communication Systems with Embedded Singular Phase Structures"],"prefix":"10.3390","volume":"22","author":[{"given":"Sergey V.","family":"Karpeev","sequence":"first","affiliation":[{"name":"IPSI RAS-Branch of the FSRC \u201cCrystallography and Photonics\u201d RAS, 443001 Samara, Russia"},{"name":"Samara National Research University, 443086 Samara, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4005-1844","authenticated-orcid":false,"given":"Vladimir V.","family":"Podlipnov","sequence":"additional","affiliation":[{"name":"IPSI RAS-Branch of the FSRC \u201cCrystallography and Photonics\u201d RAS, 443001 Samara, Russia"},{"name":"Samara National Research University, 443086 Samara, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6765-4373","authenticated-orcid":false,"given":"Svetlana N.","family":"Khonina","sequence":"additional","affiliation":[{"name":"IPSI RAS-Branch of the FSRC \u201cCrystallography and Photonics\u201d RAS, 443001 Samara, Russia"},{"name":"Samara National Research University, 443086 Samara, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nikolay A.","family":"Ivliev","sequence":"additional","affiliation":[{"name":"IPSI RAS-Branch of the FSRC \u201cCrystallography and Photonics\u201d RAS, 443001 Samara, Russia"},{"name":"Samara National Research University, 443086 Samara, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5645-7876","authenticated-orcid":false,"given":"Sofia V.","family":"Ganchevskay","sequence":"additional","affiliation":[{"name":"IPSI RAS-Branch of the FSRC \u201cCrystallography and Photonics\u201d RAS, 443001 Samara, Russia"},{"name":"Samara National Research University, 443086 Samara, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,1,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"501","DOI":"10.1364\/JON.4.000501","article-title":"Ultimate channel capacity of free-space optical communications","volume":"4","author":"Shapiro","year":"2005","journal-title":"J. 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