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Laboratory demonstration of optimizing optical single sideband scheme to increase spectral efficiency in optical geostationary satellite feeder links

Mustafa, Ahmad and Giggenbach, Dirk and Poliak, Juraj and ten brink, Stephan (2018) Laboratory demonstration of optimizing optical single sideband scheme to increase spectral efficiency in optical geostationary satellite feeder links. SPIE Remote Sensing, 10-13 Sep 2018, Berlin, Germany. DOI: 10.1117/12.2325737

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Official URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10787/107870S/Laboratory-demonstration-of-optimizing-optical-single-sideband-scheme-to-increase/10.1117/12.2325737.full?SSO=1

Abstract

Optical geostationary orbit (GEO) satellites are one of the means to provide high speed internet and broadband services to even remote areas on the globe. However, the optical beam, as it propagates through the atmosphere, is affected by the atmospheric index of refraction turbulence and pointing errors due to beam wander and mechanical vibrations on the platform which result in fading, hence loss of signal. We present transmit diversity as a fading mitigation technique and use wavelength division to minimize cross interference between the transmitted signals. Optical single sideband (OSSB) scheme is used to increase spectral efficiency (SE) of the system. We demonstrate a scheme where an OSSB signal is produced using commercially available optical filter with tunable bandwidth and center frequency. For a 32Gbps data signal modulated using amplitude shift keying (ASK), we measure the required minimum 6dB and 20dB bandwidths of the optical filter to be 12GHz and 24GHz, respectively. Also, the offset of the filter from the carrier is found to be -11GHz and +10GHz to produce an error free lower and upper OSSB signal, respectively. The SE of the OSSB signal is found to be 1.34 bit/s/Hz. Moreover the stability of the optical filters and carrier ensure reliable signal generation making the OSSB a potential candidate to be used in future free space optical links.

Item URL in elib:https://elib.dlr.de/125996/
Document Type:Conference or Workshop Item (Speech)
Title:Laboratory demonstration of optimizing optical single sideband scheme to increase spectral efficiency in optical geostationary satellite feeder links
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mustafa, AhmadAhmad.Mustafa (at) dlr.deUNSPECIFIED
Giggenbach, DirkDirk.Giggenbach (at) dlr.deUNSPECIFIED
Poliak, JurajJuraj.Poliak (at) dlr.deUNSPECIFIED
ten brink, Stephantenbrink (at) inue.uni-stuttgart.deUNSPECIFIED
Date:9 October 2018
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.1117/12.2325737
Status:Published
Keywords:Free space optics, transmitter diversity, optical filtering, optical single sideband, bit error rate,KNOCGOP
Event Title:SPIE Remote Sensing
Event Location:Berlin, Germany
Event Type:international Conference
Event Dates:10-13 Sep 2018
Organizer:SPIE
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Optische Technologien und Anwendungen
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Satellite Networks
Deposited By: Mustafa, Ahmad
Deposited On:30 Jan 2019 16:05
Last Modified:23 Feb 2019 00:23

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