Communications demonstrations for optical ground stations

Skevos Karpathakis

doi:10.26182/7npe-6434

Communications demonstrations for optical ground stations

Skevos Karpathakis

Research output: Thesis › Doctoral Thesis

389 Downloads (Pure)

Abstract

Demand for space communications bandwidth is increasing, with improvements to sensors and increasingly crowded orbits. The research project was motivated by this growing demand. Space communication currently relies on free-space radio-frequency (RF) signals. However, RF bandwidth cannot meet the increasing demands for space communications bandwidth. Also, RF signal beams diverge significantly on space-ground scales, causing interference. Free-space optical (FSO) communications promises more bandwidth and reduced divergence, virtually eliminating interference and bandwidth bottlenecks. Optical ground stations (OGS) will provide gateways for FSO-capable spacecraft. The thesis comprises descriptions of demonstrations of OGS hardware, with novel commissioning methods involving retroreflected links and pseudo-satellites.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Schediwy, Sascha, Supervisor Gozzard, David, Supervisor Nener, Brett, Supervisor Lechner, Gottfried, Supervisor, External person
Thesis sponsors	Australian Government Research Training Program
Award date	9 Sept 2024
DOIs	https://doi.org/10.26182/7npe-6434
Publication status	Unpublished - 2024

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10.26182/7npe-6434

THESIS - DOCTOR OF PHILOSOPHY - KARPATHAKIS Skevos Felix Evan - 2024
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Atmospheric turbulence characterization with simultaneous measurement of phase, angle of arrival, and intensity in a retroreflected optical link
Dix-Matthews, B. P., Karpathakis, S. F. E. & Schediwy, S. W., 1 Nov 2023, In: Optics Letters. 48, 21, p. 5519-5522 4 p.
Research output: Contribution to journal › Article › peer-review
7 Link opens in a new tab Citations (Scopus)
Ground-to-Drone Optical Pulse Position Modulation Demonstration as a Testbed for Lunar Communications
Karpathakis, S. F. E., Dix-Matthews, B. P., Walsh, S. M., McCann, A. S., Gozzard, D. R., Frost, A. M., Gravestock, C. T. & Schediwy, S. W., Feb 2023, In: Drones. 7, 2, 9 p., 99.
Research output: Contribution to journal › Article › peer-review

Open Access
4 Link opens in a new tab Citations (Scopus)
High-bandwidth coherent optical communication over 10.3 km of turbulent air
Karpathakis, S. F. E., Dix-Matthews, B. P., Gozzard, D. R. & Schediwy, S. W., 10 Aug 2023, In: Applied Optics. 62, 23, p. G85-G89
Research output: Contribution to journal › Article › peer-review
13 Link opens in a new tab Citations (Scopus)

Cite this

@phdthesis{a1eff77f96ff4dfea7d4fa6051918342,

title = "Communications demonstrations for optical ground stations",

abstract = "Demand for space communications bandwidth is increasing, with improvements to sensors and increasingly crowded orbits. The research project was motivated by this growing demand. Space communication currently relies on free-space radio-frequency (RF) signals. However, RF bandwidth cannot meet the increasing demands for space communications bandwidth. Also, RF signal beams diverge significantly on space-ground scales, causing interference. Free-space optical (FSO) communications promises more bandwidth and reduced divergence, virtually eliminating interference and bandwidth bottlenecks. Optical ground stations (OGS) will provide gateways for FSO-capable spacecraft. The thesis comprises descriptions of demonstrations of OGS hardware, with novel commissioning methods involving retroreflected links and pseudo-satellites.",

keywords = "Free-space optics, optical communications, atmospheric turbulence, drones, space communications",

author = "Skevos Karpathakis",

year = "2024",

doi = "10.26182/7npe-6434",

language = "English",

school = "The University of Western Australia",

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AU - Karpathakis, Skevos

PY - 2024

Y1 - 2024

N2 - Demand for space communications bandwidth is increasing, with improvements to sensors and increasingly crowded orbits. The research project was motivated by this growing demand. Space communication currently relies on free-space radio-frequency (RF) signals. However, RF bandwidth cannot meet the increasing demands for space communications bandwidth. Also, RF signal beams diverge significantly on space-ground scales, causing interference. Free-space optical (FSO) communications promises more bandwidth and reduced divergence, virtually eliminating interference and bandwidth bottlenecks. Optical ground stations (OGS) will provide gateways for FSO-capable spacecraft. The thesis comprises descriptions of demonstrations of OGS hardware, with novel commissioning methods involving retroreflected links and pseudo-satellites.

AB - Demand for space communications bandwidth is increasing, with improvements to sensors and increasingly crowded orbits. The research project was motivated by this growing demand. Space communication currently relies on free-space radio-frequency (RF) signals. However, RF bandwidth cannot meet the increasing demands for space communications bandwidth. Also, RF signal beams diverge significantly on space-ground scales, causing interference. Free-space optical (FSO) communications promises more bandwidth and reduced divergence, virtually eliminating interference and bandwidth bottlenecks. Optical ground stations (OGS) will provide gateways for FSO-capable spacecraft. The thesis comprises descriptions of demonstrations of OGS hardware, with novel commissioning methods involving retroreflected links and pseudo-satellites.

KW - Free-space optics

KW - optical communications

KW - atmospheric turbulence

KW - drones

KW - space communications

U2 - 10.26182/7npe-6434

DO - 10.26182/7npe-6434

M3 - Doctoral Thesis

ER -

Communications demonstrations for optical ground stations

Abstract

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Research output

Atmospheric turbulence characterization with simultaneous measurement of phase, angle of arrival, and intensity in a retroreflected optical link

Ground-to-Drone Optical Pulse Position Modulation Demonstration as a Testbed for Lunar Communications

High-bandwidth coherent optical communication over 10.3 km of turbulent air

Cite this