{"id":5615,"date":"2017-08-09T14:42:00","date_gmt":"2017-08-09T12:42:00","guid":{"rendered":"https:\/\/www.cailabs.com\/technical-publications-and-conferences\/80-gbit-s-100-m-free-space-optical-data-transmission-link-via-a-flying-uav-using-multiplexing-of-orbital-angular-momentum-beams\/"},"modified":"2024-02-26T12:11:35","modified_gmt":"2024-02-26T11:11:35","slug":"80-gbit-s-100-m-free-space-optical-data-transmission-link-via-a-flying-uav-using-multiplexing-of-orbital-angular-momentum-beams","status":"publish","type":"publication","link":"https:\/\/www.cailabs.com\/fr\/publications-techniques-conferences\/reseaux-fibres\/80-gbit-s-100-m-free-space-optical-data-transmission-link-via-a-flying-uav-using-multiplexing-of-orbital-angular-momentum-beams\/","title":{"rendered":"80-Gbit\/s 100-m Free-Space Optical Data Transmission Link via a Flying UAV Using Multiplexing of Orbital-Angular-Momentum Beams"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Authors: Long Li<sup>1*\u2020<\/sup>, Runzhou Zhang<sup>1\u2020<\/sup>, Zhe Zhao<sup>1<\/sup>, Guodong Xie<sup>1<\/sup>, Peicheng Liao<sup>1<\/sup>, Kai Pang<sup>1<\/sup>, Haoqian Song<sup>1<\/sup>, Cong Liu<sup>1<\/sup>, Yongxiong Ren<sup>1<\/sup>, Guillaume Labroille<sup>2<\/sup>, Pu Jian<sup>2<\/sup>,Dmitry Starodubov<sup>1<\/sup>, Robert Bock<sup>3<\/sup>, Moshe Tur<sup>4<\/sup>, Alan E. Willner<sup>1*<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><sup>1<\/sup>Department of Electrical Engineering, University of Southern California, Los Angeles,<br>California 90089, USA.<br><sup>2<\/sup>Cailabs, Rennes 35200, France.<br><sup>3<\/sup>R-DEX Systems, Marietta, Georgia 30068, USA.<br><sup>4<\/sup>School of Electrical Engineering, Tel Aviv University, Ramat Aviv 69978, Israel.<br><sup>*<\/sup>Correspondence to: longl@usc.edu, willner@usc.edu.<br><sup>\u2020<\/sup>These authors contributed equally to this work.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Abstract<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">We explore the use of orbital-angular-momentum (OAM)-multiplexing to increase the capacity of free-space data transmission to moving platforms, with an added potential benefit of decreasing the probability of data intercept. Specifically, we experimentally demonstrate and characterize the performance of an OAM-multiplexed, free-space optical (FSO) communications link between a ground station and a moving unmanned-aerial-vehicle (UAV). We achieve a total capacity of 80 Gbit\/s up to 100-m-roundtrip link by multiplexing 2 OAM beams, each carrying a 40-Gbit\/s quadrature-phase-shift-keying (QPSK) signal. Moreover, we investigate for static, hovering, and moving conditions the effects of channel impairments, including: tracking errors, propeller-induced airflows, power loss, intermodal crosstalk, and system bit error rate (BER). We find the following: (a) when the UAV hovers in the air, the power on the desired mode fluctuates by 2.1 dB, while the crosstalk to the other mode is -19 dB below the power on the desired mode; and (b) when the UAV moves in the air, the power fluctuation on the desired mode increases to 4.3 dB and the crosstalk to the other mode increases to -10 dB. Furthermore, the channel crosstalk decreases with an increase in OAM mode spacing.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/arxiv.org\/abs\/1708.02923v1\" target=\"_blank\" rel=\"noreferrer noopener\">More information<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Authors: Long Li1*\u2020, Runzhou Zhang1\u2020, Zhe Zhao1, Guodong Xie1, Peicheng Liao1, Kai Pang1, Haoqian Song1, Cong Liu1, Yongxiong Ren1, Guillaume Labroille2, Pu Jian2,Dmitry Starodubov1, Robert Bock3, Moshe Tur4, Alan E. Willner1* 1Department of Electrical Engineering, University of Southern California, Los Angeles,California 90089, USA.2Cailabs, Rennes 35200, France.3R-DEX Systems, Marietta, Georgia 30068, USA.4School of Electrical Engineering, Tel [&hellip;]<\/p>\n","protected":false},"author":2,"parent":0,"template":"","categorie-publication":[100],"class_list":["post-5615","publication","type-publication","status-publish","hentry","categorie-publication-reseaux-fibres"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>80-Gbit\/s 100-m Free-Space Optical Data Transmission Link via a Flying UAV Using Multiplexing of Orbital-Angular-Momentum Beams - Cailabs<\/title>\n<meta name=\"description\" content=\"We explore the use of orbital-angular-momentum (OAM)-multiplexing to increase the capacity of free-space data transmission to moving platforms\" \/>\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.cailabs.com\/fr\/publications-techniques-conferences\/reseaux-fibres\/80-gbit-s-100-m-free-space-optical-data-transmission-link-via-a-flying-uav-using-multiplexing-of-orbital-angular-momentum-beams\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"80-Gbit\/s 100-m Free-Space Optical Data Transmission Link via a Flying UAV Using Multiplexing of Orbital-Angular-Momentum Beams - 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