Tbit/s line-rate satellite feeder links enabled by coherent modulation and full-adaptive optics

Yannik Horst; Bertold Ian Bitachon; Laurenz Kulmer; Jannik Brun; Tobias Blatter; Jean-Marc Conan; Aurélie Montmerle-Bonnefois; Joseph Montri; Béatrice Sorrente; Caroline B. Lim; Nicolas Védrenne; Daniel Matter; Loann Pommarel; Benedikt Baeuerle; Juerg Leuthold

doi:10.1038/s41377-023-01201-7

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Tbit/s line-rate satellite feeder links enabled by coherent modulation and full-adaptive optics

Original Articles

- Tbit/s line-rate satellite feeder links enabled by coherent modulation and full-adaptive optics
- Light: Science & Applications Vol. 12, Issue 9, Pages: 1727-1738(2023)
- Affiliations：
  
  1.ETH Zurich, Institute of Electromagnetic Fields (IEF), Gloriastrasse 35, 8092 Zürich, Switzerland
  2.ONERA, DOTA, Paris Saclay University, F-92322 Châtillon
  3.Thales Alenia Space in Switzerland, Schaffhauserstrasse 580, 8052 Zürich, Switzerland
  4.Polariton Technologies AG, 8803 Rüschlikon, Switzerland
  5.Present address: Currently with LNE-SYRTE, Observatoire de Paris, Paris, France
- Author bio：
  
  Yannik Horst (yannik.horst@ief.ee.ethz.ch)
  Juerg Leuthold (leuthold@ethz.ch)
- Funds：
- DOI：10.1038/s41377-023-01201-7
  CLC：
- Published：30 September 2023，
  
  Published Online：20 June 2023，
  
  Received：09 February 2023，
  
  Revised：04 May 2023，
  
  Accepted：01 June 2023
- Accepted：
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Horst, Y. et al. Tbit/s line-rate satellite feeder links enabled by coherent modulation and full-adaptive optics. Light: Science & Applications, 12, 1727-1738 (2023).
DOI：

Horst, Y. et al. Tbit/s line-rate satellite feeder links enabled by coherent modulation and full-adaptive optics. Light: Science & Applications, 12, 1727-1738 (2023). DOI： 10.1038/s41377-023-01201-7.

摘要

Abstract

Free-space optical (FSO) communication technologies constitute a solution to cope with the bandwidth demand of future satellite-ground netwo

rks. They may overcome the RF bottleneck and attain data rates in the order of Tbit/s with only a handful of ground stations. Here

we demonstrate single-carrier Tbit/s line-rate transmission over a free-space channel of 53.42 km between the Jungfraujoch mountain top (3700 m) in the Swiss Alps and the Zimmerwald Observatory (895 m) near the city of Bern

achieving net-rates of up to 0.94 Tbit/s. With this scenario a satellite-ground feeder link is mimicked under turbulent conditions. Despite adverse conditions high throughput was achieved by employing a full adaptive optics system to correct the distorted wavefront of the channel and by using polarization-multiplexed high-order complex modulation formats. It was found that adaptive optics does not distort the reception of coherent modulation formats. Also

we introduce constellation modulation – a new four-dimensional BPSK (4D-BPSK) modulation format as a technique to transmit high data rates under lowest SNR. This way we show 53 km FSO transmission of 13.3 Gbit/s and 210 Gbit/s with as little as 4.3 and 7.8 photons per bit

respectively

at a bit-error ratio of 1 ∙ 10

−3

. The experiments show that advanced coherent modulation coding in combination with full adaptive optical filtering are proper means to make next-generation Tbit/s satellite communications practical.

关键词

Keywords

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