Demonstration of Adaptive Optical Pre-Compensation in Horizontal Tests
Brady A, Eberhardt R, Tunnermann A, Reinlein C (2019)
Publication Type: Conference contribution
Publication year: 2019
Publisher: Institute of Electrical and Electronics Engineers Inc.
Conference Proceedings Title: 2019 IEEE International Conference on Space Optical Systems and Applications, ICSOS 2019
Event location: Portland, OR, USA
ISBN: 9781728105000
DOI: 10.1109/ICSOS45490.2019.8978973
Abstract
Though long anticipated, adaptive optical (AO) pre-compensation is now experiencing a surge in interest thanks to technological advances and the identification of a real-world application with the advent of satellite laser communication as a viable alternative to radio-frequency. Here, we present an overview of our activities to date in pre-compensation, from the development of our AO system in laboratory experiments using artificial turbulence [1], to the integration into a transportable 'AO-box' and testing in first proof-of-principle experiments over horizontal links using real turbulence [2] to the verification in horizontal tests of pre-compensation under large point-ahead-angles beyond the estimated isoplanatic range [3]. We describe the concept and realization of our experimental setup which provides simultaneous bidirectional correction of the incoming beam (post-compensation) and outgoing beam (pre-compensation). We then detail the transfer of this setup into two optical terminals representing a 'ground terminal' and 'satellite terminal'. We describe the results of the horizontal measurement campaigns which have been undertaken to date in which a 7.1 dB increase in the received intensity was demonstrated under a small PAA over 0.5 km and in which a decline in the received laser power over increasingly large point-ahead-angle was demonstrated over a 1.0 km test range. We conclude with the current outlook for pre-compensation technology and indicate future planned experiments.
Involved external institutions
Germany (DE)How to cite
APA:
Brady, A., Eberhardt, R., Tunnermann, A., & Reinlein, C. (2019). Demonstration of Adaptive Optical Pre-Compensation in Horizontal Tests. In 2019 IEEE International Conference on Space Optical Systems and Applications, ICSOS 2019. Portland, OR, USA: Institute of Electrical and Electronics Engineers Inc..
MLA:
Brady, Aoife, et al. "Demonstration of Adaptive Optical Pre-Compensation in Horizontal Tests." Proceedings of the 2019 IEEE International Conference on Space Optical Systems and Applications, ICSOS 2019, Portland, OR, USA Institute of Electrical and Electronics Engineers Inc., 2019.
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