{"id":9183,"date":"2021-05-27T08:48:52","date_gmt":"2021-05-27T08:48:52","guid":{"rendered":"https:\/\/www.kolabtree.com\/blog\/?p=9183"},"modified":"2021-09-30T12:07:13","modified_gmt":"2021-09-30T12:07:13","slug":"bikash-kumar-das-vector-vortex-beam-scattering-communication-application","status":"publish","type":"post","link":"https:\/\/www.kolabtree.com\/blog\/fr\/bikash-kumar-das-vector-vortex-beam-scattering-communication-application\/","title":{"rendered":"Bikash Kumar Das : Faisceau de vortex vectoriel et leur diffusion pour une application de communication."},"content":{"rendered":"

Bikash Kumar Das<\/em><\/a> est un expert en science des mat\u00e9riaux et en optique classique, et propose des services en freelance \u00e0 Kolabtree.<\/p>\n

A propos du projet<\/strong><\/p>\n

\"\"<\/p>\n

Actuellement, je travaille sur un projet intitul\u00e9 \"Faisceau de vortex vectoriel et leur diffusion pour les applications de communication\". Dans notre laboratoire d'optique, nous concevons de nouveaux outils et techniques pour g\u00e9n\u00e9rer des faisceaux de vortex vectoriels. Plus r\u00e9cemment, j'ai propos\u00e9 une technique o\u00f9 l'utilisation d'un polariseur laser glan (GLP), d'une plaque q et d'un modulateur spatial de lumi\u00e8re (SLM) sensible \u00e0 la polarisation g\u00e9n\u00e8re un faisceau de vortex vectoriel qui a une phase ind\u00e9finie au centre et un profil de polarisation non uniforme. Nous avons utilis\u00e9 ce faisceau afin d'\u00e9tablir une communication s\u00e9curis\u00e9e entre deux extr\u00e9mit\u00e9s (les donn\u00e9es seront crypt\u00e9es en toute s\u00e9curit\u00e9) et avons cod\u00e9 les informations optiques. Outre le faisceau de vortex vectoriel, nous avons \u00e9galement g\u00e9n\u00e9r\u00e9 des faisceaux de vortex optiques parfaits (POV) dans notre laboratoire \u00e0 l'aide d'un SLM (fonctionnant en mode phase uniquement), d'un axicon et d'une lentille (qui effectue la transformation de Fourier optique des faisceaux de Gauss de Bessel afin de g\u00e9n\u00e9rer le faisceau POV). Nous avons \u00e9galement diffus\u00e9 ces faisceaux \u00e0 travers une plaque de verre d\u00e9poli (GGP), apr\u00e8s quoi des motifs de chatoiement (un motif de lumi\u00e8re al\u00e9atoire finement granulaire qui est g\u00e9n\u00e9r\u00e9 par l'interf\u00e9rence de nombreux fronts d'onde diffus\u00e9s \u00e0 partir des inhomog\u00e9n\u00e9it\u00e9s pr\u00e9sentes dans la surface d'une GGP) ont \u00e9t\u00e9 g\u00e9n\u00e9r\u00e9s. Nous avons ensuite pris la corr\u00e9lation (auto-corr\u00e9lation et corr\u00e9lation crois\u00e9e) de deux motifs de speckle et utilis\u00e9 cette corr\u00e9lation pour \u00e9tablir une communication classique.\u00a0<\/span><\/p>\n

\"\"<\/a> \"\" \"\" \"\"\"\"<\/a><\/p>\n

A propos de l'auteur, Bikash Kumar Das\u00a0<\/strong><\/p>\n

I work as a recherche<\/a> fellow of physics in the project titled \u201cVector vortex beam and their scattering for communication application\u201d funded by Science and Engineering Research Board (SERB), Department of Science and Technology (DST), Govt.of India. <\/span><\/p>\n

Auparavant, j'avais achev\u00e9 avec succ\u00e8s deux projets intitul\u00e9s \"Croissance d'un film mince de ZnO sur un substrat de silicium et de verre par la technique de d\u00e9p\u00f4t par laser puls\u00e9\" \u00e0 l'Institut de physique, DAE, Govt. of India en tant que Summer Student Visiting Program (SSVP) Fellow financ\u00e9 par le D\u00e9partement de l'\u00e9nergie atomique (DAE) et \"Effet du dopage Gd, Ca sur la structure, le magn\u00e9tisme et le transport \u00e9tudi\u00e9s de SrMnO\".<\/span>3<\/span> Perovskite\" \u00e0 l'universit\u00e9 d'Utkal. En outre, j'ai re\u00e7u la m\u00e9daille d'or du chancelier (gouverneur de l'Odisha) pour avoir obtenu les meilleures notes \u00e0 mon dipl\u00f4me d'\u00e9tudes sup\u00e9rieures \u00e0 l'Universit\u00e9 d'Utkal, ainsi que de nombreuses bourses et r\u00e9compenses prestigieuses telles que la bourse UGC Rank Holder (2016-17), la bourse de l'Institut de math\u00e9matiques et d'applications (AIR-02), la bourse de m\u00e9rite Khirgovind, le Graduate Aptitude Test in Engineering (GATE), le Joint Entrance Screening Test (JEST), etc. <\/span><\/p>\n

Je suis membre de l'American Physical Society (APS), de l'American Chemical Society (ACS), de l'Optical Society of America (OSA), de l'Asia Society of Researchers (ASR), de l'Institute of Corrosion et de la Cognitive Science Society (CSS).<\/span><\/p>\n

Contactez-moi sur Kolabtree ici.<\/strong><\/a><\/p>","protected":false},"excerpt":{"rendered":"

Bikash Kumar Das est un expert en science des mat\u00e9riaux et en optique classique, et propose des services en freelance sur Kolabtree. A propos du projet Actuellement, je travaille sur un projet intitul\u00e9 \"Faisceau de vortex vectoriel et leur diffusion pour les applications de communication\". Dans notre laboratoire d'optique, nous concevons de nouveaux outils et techniques pour g\u00e9n\u00e9rer des faisceaux de vortex vectoriels. Plus r\u00e9cemment,<\/p>\n

Lire la suite<\/a><\/div>","protected":false},"author":12,"featured_media":9190,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[662,661],"tags":[],"acf":[],"yoast_head":"\nBikash Kumar Das: Vector vortex beam and their scattering for communication application - The Kolabtree Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kolabtree.com\/blog\/fr\/bikash-kumar-das-vector-vortex-beam-scattering-communication-application\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bikash Kumar Das: Vector vortex beam and their scattering for communication application\" \/>\n<meta property=\"og:description\" content=\"Bikash Kumar Das is an expert in material science and classical optics, and offers freelance services at Kolabtree. 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