Wavefront sensing for terrestrial, underwater, and space-borne free-space optical communications

被引：1

作者：

Gladysz, Szymon ^{[1
]}

Zepp, Andreas ^{[1
]}

Segel, Max ^{[1
]}

McDonald, Douglas ^{[1
]}

Bellossi, Raphael ^{[1
]}

Lechner, Daniel ^{[1
,2
]}

Gasperin, Osvaldo Javier Galicia ^{[1
]}

Stein, Karin ^{[1
]}

机构：

[1] Fraunhofer Inst Optron Syst Technol & Image Explo, Fraunhofer IOSB, Gutleuthausstr 1, D-76275 Ettlingen, Germany

[2] Karlsruhe Inst Technol, Inst Control Syst IRS, Fritz Haber Weg 1, D-76131 Karlsruhe, Germany

来源：

LASER COMMUNICATION AND PROPAGATION THROUGH THE ATMOSPHERE AND OCEANS X | 2021年 / 11834卷

关键词：

adaptive optics; wavefront sensing; atmospheric turbulence; free-space optical communications; LOOP ADAPTIVE OPTICS; SENSOR;

D O I：

10.1117/12.2595727

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We present several solutions to problems particular to adaptive optics for free-space laser based communications. Specifically, for scenarios where strong scintillation is present, we have developed a digital, adaptable Shack-Hartmann wavefront sensor, as well as the modal holographic wavefront sensor based on the Karhunen-Loeve modes. Additionally, using the same modal basis and optimization algorithms from deep learning, we have improved upon stochastic parallel gradient descent wavefront-sensorless approach For underwater communications, we have set up a water tank and demonstrated real-time adaptive optics in the visible. For deep-space downlinks, we have investigated several wavefront-sensing modalities with respect to their robustness to very low signal-to-background ratios expected during daytime. We also present results of data transmission experiments using coherent modulation over a 400-m double-pass horizontal link.

引用

页数：12

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