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Optical technologies for very high throughput satellite communications

Mata Calvo, Ramon and Poliak, Juraj and Surof, Janis and Reeves, Andrew and Richerzhagen, Mathias and Kelemu, Helawae Friew and Barrios, Ricardo and Carrizo, Carlos Eduardo and Wolf, Raphael and Rein, Fabian and Dochhan, Annika and Saucke, Karen and Luetke, Wolfram (2019) Optical technologies for very high throughput satellite communications. SPIE. SPIE Photonics West LASE, 2-7 Februar 2019, San Francisco, USA. DOI: 10.1117/12.2513819 ISSN 0277-786X

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Official URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10910/2513819/Optical-technologies-for-very-high-throughput-satellite-communications/10.1117/12.2513819.full?SSO=1

Abstract

Broadband internet access has become a vertex for the future development of society and industry in the digital era. Geostationary orbit (GEO) satellite can provide global broadband coverage, becoming a complementary solution to optical fiber network. Low-earth-orbit (LEO) constellations have been proposed in the last years and they may become a reality soon, but still based on radiofrequency for the ground-to-satellite links. Optical technologies offer multiple THz of available spectrum, which can be used in the feeder link. The DLRs Institute of Communications and Navigation has demonstrated Terabit-per-second throughput in relevant environment for GEO communications, in terms of the turbulent channel. In 2016 DLR set the world-record in free-space communications to 1.72 Tbit/s, and in 2017 to 13.16 Tbit/s. Two terminals, emulating the satellite and the ground station have been developed. Bi-directional communications link with single-mode-fiber coupling at both ends was demonstrated. Adaptive optics for the downlink and uplink (pre-distortion) improved the fiber-coupling in downlink and decreased signal fluctuations in uplink. A 80 Gbit/s QPSK system based on digital homodyne reception was also developed, demonstrating the use of coherent communications under strong turbulence conditions. These activities were performed in the frame of two internal DLR projects, THRUST and Global Connectivity Synergy project. Several measurement campaigns took place in the last years in a valley-to-mountain-top test-link. Turbulence has been monitored at both ends and the point-ahead-angle has been emulated by separating the downlink beacon from the receiving aperture. An overview of the system and the main results will be presented.

Item URL in elib:https://elib.dlr.de/126597/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Querschnittsthema Global Connectivity
Title:Optical technologies for very high throughput satellite communications
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mata Calvo, RamonRamon.MataCalvo (at) dlr.dehttps://orcid.org/0000-0001-7120-8026
Poliak, Jurajjuraj.poliak (at) dlr.dehttps://orcid.org/0000-0002-6599-3117
Surof, JanisJanis.Surof (at) dlr.deUNSPECIFIED
Reeves, AndrewAndrew.Reeves (at) dlr.deUNSPECIFIED
Richerzhagen, MathiasMathias.Richerzhagen (at) dlr.deUNSPECIFIED
Kelemu, Helawae FriewHelawae.Kelemu (at) dlr.deUNSPECIFIED
Barrios, RicardoRicardo.Barrios (at) dlr.dehttps://orcid.org/0000-0002-2545-5568
Carrizo, Carlos Eduardocarlos.carrizo (at) dlr.dehttps://orcid.org/0000-0003-4933-5832
Wolf, RaphaelRaphael.Wolf (at) dlr.deUNSPECIFIED
Rein, Fabianfabian.rein (at) dlr.deUNSPECIFIED
Dochhan, AnnikaADVAUNSPECIFIED
Saucke, KarenTesat-Spacecom GmbH & Co. KGUNSPECIFIED
Luetke, WolframTesat-Spacecom GmbH & Co. KGUNSPECIFIED
Date:4 March 2019
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:109100
DOI :10.1117/12.2513819
Publisher:SPIE
Series Name:Proc. SPIE 10910, Free-Space Laser Communications XXXI
ISSN:0277-786X
Status:Published
Keywords:Satellie communications; very high throughput satellites; optical communications; free-space optical communications; atmospheric turbulence; adaptive optics; coherent communications; digital homodyne; world record
Event Title:SPIE Photonics West LASE
Event Location:San Francisco, USA
Event Type:international Conference
Event Dates:2-7 Februar 2019
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben Multimedia Satellitennetze
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Satellite Networks
Deposited By: Mata Calvo, Ramon
Deposited On:15 Mar 2019 14:06
Last Modified:15 Mar 2019 14:06

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