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Fiber coupling and field mixing of coherent free-space optical beams in satellite communications

Poliak, Juraj and Giggenbach, Dirk and Mata Calvo, Ramon and Bok, Dominik (2016) Fiber coupling and field mixing of coherent free-space optical beams in satellite communications. In: Proc. SPIE 9739, Free-Space Laser Communication and Atmospheric Propagation XXVIII. SPIE Photonics West 2016 Conference on Free-Space Laser Communication and Atmospheric Propagation XXVIII, 13-18 Feb 2016, San Francisco, USA. DOI: 10.1117/12.2212218

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Official URL: http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2504575

Abstract

Effective coupling of the optical field from free-space to optical fiber is an essential prerequisite for modern free-space optical communications systems. It allows for easier system integration with active and passive optical fiber-coupled components as well as for efficient optical field mixing for coherent communications. While coupling into single-mode fiber provides the advantage of using low-noise erbium-doped fiber preamplifiers, its relatively small mode field diameter limits achievable fiber coupling efficiency. Coupling into multimode fiber (MMF) increases the fiber coupling efficiency while introducing other spurious effects the authors have set out to analyze. The study of free-space optical beam coupling in the context of satellite communications will be presented. Here, we assume satellite link scenarios with different elevations, which correspond to different index-of-refraction turbulence (IRT) conditions. IRT gives rise to both intensity and phase aberration of the received optical field, which then causes extended speckle patterns in the focus of the receiver telescope. The speckle field at the fiber input is calculated by means of Fourier transform of the received field. Using dedicated modelling software, study of the fiber coupling efficiency, polarization preservation and high-order mode coupling in different multi-mode fibers is carried out.

Item URL in elib:https://elib.dlr.de/103600/
Document Type:Conference or Workshop Item (Poster)
Title:Fiber coupling and field mixing of coherent free-space optical beams in satellite communications
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Poliak, Jurajjuraj.poliak (at) dlr.deUNSPECIFIED
Giggenbach, Dirkdirk.giggenbach (at) dlr.deUNSPECIFIED
Mata Calvo, RamonRamon.MataCalvo (at) dlr.deUNSPECIFIED
Bok, Dominikdominik.bok (at) dlr.deUNSPECIFIED
Date:15 March 2016
Journal or Publication Title:Proc. SPIE 9739, Free-Space Laser Communication and Atmospheric Propagation XXVIII
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.1117/12.2212218
Status:Published
Keywords:optical fiber coupling, optical satellite links, atmospheric turbulence, multimode fiber, KNOCGOP
Event Title:SPIE Photonics West 2016 Conference on Free-Space Laser Communication and Atmospheric Propagation XXVIII
Event Location:San Francisco, USA
Event Type:international Conference
Event Dates:13-18 Feb 2016
Organizer:SPIE
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: Poliak, Juraj
Deposited On:29 Mar 2016 16:40
Last Modified:03 Aug 2016 11:50

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