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Adaptive Optics pre-compensated laser uplink to LEO and GEO

Osborn, James and Townson, Matthew and Farley, Ollie and Reeves, Andrew and Mata Calvo, Ramon (2021) Adaptive Optics pre-compensated laser uplink to LEO and GEO. Optics Express, 29 (4), pp. 6113-6132. Optical Society of America. doi: 10.1364/OE.413013. ISSN 1094-4087.

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Official URL: https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-29-4-6113&id=447670

Abstract

We present the results from a Monte Carlo computer simulation of adaptive optics (AO) pre-compensated laser uplink propagation through the Earth’s atmospheric turbulence from the ground to orbiting satellites. The simulation includes the so-called point-ahead angle and tests several potential AO mitigation modes such as tip/tilt or full AO from the downlink beam, and a laser guide star at the point ahead angle. The performance of these modes, as measured by metrics relevant for free-space optical communication, are compared with no correction and perfect correction. The aim of the study is to investigate fundamental limitations of free-space optical communications with AO pre-compensation and a point-ahead angle, therefore the results represent an upper bound of AO corrected performance, demonstrating the potential of pre-compensation technology. Performance is assessed with varying launch aperture size, wavelength, launch geometry, ground layer turbulence strength (i.e. day/night), elevation angle and satellite orbit (Low-Earth and Geostationary). By exploring this large parameter space we are able examine trends on performance with the aim of informing the design of future optical ground stations and demonstrating and quantifying the potential upper bounds of adaptive optics performance in free-space optical communications.

Item URL in elib:https://elib.dlr.de/140930/
Document Type:Article
Title:Adaptive Optics pre-compensated laser uplink to LEO and GEO
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Osborn, JamesDurham UniversityUNSPECIFIED
Townson, MatthewDurham UniversityUNSPECIFIED
Farley, OllieDurham UniversityUNSPECIFIED
Reeves, AndrewAndrew.Reeves (at) dlr.dehttps://orcid.org/0000-0002-8555-5368
Mata Calvo, RamonRamon.MataCalvo (at) dlr.deUNSPECIFIED
Date:February 2021
Journal or Publication Title:Optics Express
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:29
DOI :10.1364/OE.413013
Page Range:pp. 6113-6132
Publisher:Optical Society of America
ISSN:1094-4087
Status:Accepted
Keywords:Atmospheric turbulence Computer simulation Free space optics Laser beams Laser guide stars Laser ranging
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 (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Satellite Networks
Deposited By: Reeves, Dr Andrew
Deposited On:18 Feb 2021 14:30
Last Modified:18 Feb 2021 14:30

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