Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Adaptive optics LEO uplink pre-compensation with finite spatial modes

Not Accessible

Your library or personal account may give you access

Abstract

Adaptive optics pre-compensation of free-space optical communications uplink from ground to space is complicated by the “point ahead angle” due to spacecraft velocity and the finite speed of light, as well as anisoplanatism of the uplink beam and the wavefront beacon. This Letter explores how pre-compensation varies with the number of spatial modes applied and how it varies with a beacon at the point-ahead angle versus a downlink beacon. Using a w0 = 16 cm Gaussian beam propagating through a modified Hufnagel–Valley model as an example, we find pre-compensation performance plateaus beyond ∼100 applied modes regardless of integrated turbulence strength, and that a point ahead beacon provides a 1–4 dB gain in median received power and an order-of-magnitude reduction in scintillation over a downlink beacon at wavelengths typical of optical communications. Modeling tailored to specific scenarios should be conducted to determine whether implementing a resource-intensive point ahead beacon is the optimum path to meeting link requirements.

© 2023 Optica Publishing Group

Full Article  |  PDF Article
More Like This
Adaptive Optics pre-compensated laser uplink to LEO and GEO

James Osborn, Matthew J. Townson, Ollie J. D. Farley, Andrew Reeves, and Ramon Mata Calvo
Opt. Express 29(4) 6113-6132 (2021)

Two-aperture measurements for GEO-feeder adaptive optics pre-compensation optimization

Perrine Lognoné, Jean-Marc Conan, Ghaya Rekaya, Laurie Paillier, and Nicolas Védrenne
Opt. Lett. 48(17) 4550-4553 (2023)

Experimental validation of phase-only pre-compensation over 494 m free-space propagation

Aoife Brady, René Berlich, Nina Leonhard, Teresa Kopf, Paul Böttner, Ramona Eberhardt, and Claudia Reinlein
Opt. Lett. 42(14) 2679-2682 (2017)

Data availability

No data were generated or analyzed in the presented research.

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (2)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved