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Proof of concept for adaptive sequential optimization of free-space communication receivers

Carrizo, Carlos Eduardo and Mata Calvo, Ramon and Belmonte, Aniceto (2019) Proof of concept for adaptive sequential optimization of free-space communication receivers. Applied Optics, 58 (20), pp. 5397-5403. Optical Society of America. DOI: 10.1364/AO.58.005397 ISSN 1559-128X

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Official URL: https://www.osapublishing.org/ao/abstract.cfm?uri=ao-58-20-5397


In a downlink scenario, the performance of laser satellite communications is limited due to atmospheric turbulence, which causes fluctuations in the intensity and the phase of the received signal leading to an increase in bit error probability. In principle, a single-aperture phase-compensated receiver, based on adaptive optics, can overcome atmospheric limitations by adaptive tracking and correction of atmospherically induced aberrations. However, under strong-turbulence situations, the effectiveness of traditional adaptive optics systems is severely compromised. We have developed an alternative intensity-based technique that corrects the wave-front by iteratively updating the phases of individual focal-plane speckles, maximizing the power coupled into a single-mode fiber. Here, we present the proof of concept for this method. We show how this technique offers around 4 dB power gain with less than 60 power measurements under strong turbulence conditions. It delivers a good performance in different turbulent regimes, and it shows robustness against severe deterioration of the signal to noise ratio.

Item URL in elib:https://elib.dlr.de/127872/
Document Type:Article
Title:Proof of concept for adaptive sequential optimization of free-space communication receivers
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Carrizo, Carlos Eduardocarlos.carrizo (at) dlr.deUNSPECIFIED
Mata Calvo, RamonRamon.MataCalvo (at) dlr.deUNSPECIFIED
Belmonte, Anicetobelmonte (at) tsc.upc.eduUNSPECIFIED
Date:5 July 2019
Journal or Publication Title:Applied Optics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1364/AO.58.005397
Page Range:pp. 5397-5403
Publisher:Optical Society of America
Keywords:Free-space optics, adaptive optics, laser communications, turbulence, iterative method, KNOCGOP, SAN-AOT
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:10 Dec 2019 17:00
Last Modified:10 Dec 2019 17:00

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