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Intensity-based adaptive optics with sequential optimization for laser communications

Carrizo, Carlos Eduardo and Mata Calvo, Ramon and Belmonte, Aniceto (2018) Intensity-based adaptive optics with sequential optimization for laser communications. Optics Express, 26 (13), pp. 16044-16053. Optical Society of America. DOI: 10.1364/OE.26.016044 ISSN 1094-4087

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Official URL: https://www.osapublishing.org/oe/abstract.cfm?uri=oe-26-13-16044


Wavefront distortions of optical waves propagating through the turbulent atmosphere are responsible for phase and amplitude fluctuations, causing random fading in the signal coupled into single-mode optical fibers. Wavefront aberrations can be confronted, in principle, with adaptive optics technology that compensates the incoming optical signal by the phase conjugation principle and mitigates the likeliness of fading. However, real-time adaptive optics requires phase wavefront measurements, which are generally difficult under typical propagation conditions for communication scenarios. As an alternative to the conventional adaptive optics approach, here, we discuss a novel phase-retrieval technique that indirectly determines the unknown phase wavefront from focal-plane intensity measurements. The adaptation approach is based on sequential optimization of the speckle pattern in the focal plane and works by iteratively updating the phases of individual speckles to maximize the received power. We found in our analysis that this technique can compensate the distorted phasefront and increase the signal coupled with a significant reduction in the required number of iterations, resulting in a loop bandwidth utilization well within the capacity of commercially available deformable mirrors.

Item URL in elib:https://elib.dlr.de/120496/
Document Type:Article
Title:Intensity-based adaptive optics with sequential optimization for laser communications
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Carrizo, Carlos Eduardocarlos.carrizo (at) dlr.dehttps://orcid.org/0000-0003-4933-5832
Mata Calvo, RamonRamon.MataCalvo (at) dlr.deUNSPECIFIED
Belmonte, Anicetobelmonte (at) tsc.upc.eduUNSPECIFIED
Date:11 June 2018
Journal or Publication Title:Optics Express
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.1364/OE.26.016044
Page Range:pp. 16044-16053
Carrizo, Carlos Eduardocarlos.carrizo@dlr.de
Mata Calvo, Ramonramon.matacalvo@dlr.de
Belmonte, Anicetobelmonte@tsc.upc.edu
Publisher:Optical Society of America
Series Name:OSA
Keywords:Free-space optical communication; Active or adaptive optics; speckle; SAN-AOT; KNOCGOP
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: Carrizo, Carlos Eduardo
Deposited On:19 Jun 2018 13:51
Last Modified:15 Jan 2019 11:30

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