Pre-correction adaptive optics performance for a 10 km laser link
conference paper
For the next generation of very high throughput communication satellites, free-space optical (FSO) communication between ground stations and geostationary telecommunication satellites is likely to replace conventional RF links. To mitigate atmospheric turbulence, TNO and DLR propose Adaptive Optics (AO) to apply uplink pre-correction. In order to demonstrate the feasibility of AO pre-correction an FSO link has been tested over a 10 km range. This paper shows that AO pre-correction is most advantageous for low point ahead angles (PAAs), as expected. In addition, an optimum AO precorrection performance is found at 16 AO modes for the experimental conditions. For the specific test site, tip-tilt precorrection accounted for 4.5 dB improvement in the link budget. Higher order AO modes accounted for another 1.5 dB improvement in the link budget. From these results it is concluded that AO pre-correction can effectively improve high-throughput optical feeder links.
TNO Identifier
867432
ISSN
0277786X
ISBN
9781510624627
Publisher
SPIE
Article nr.
109101H
Source title
Proceedings Free-Space Laser Communications XXXI, SPIE LASE, San Fransisco, CA, USA, 4-6 February 2019
Editor(s)
Boroson, D.M.
Hemmati, H.
Hemmati, H.
Collation
8 p.
Files
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