A Hybrid Wave Front Correction Method for Sensor-less Adaptive Optics in Free Space Optical Communication

2018 ◽  
Author(s):  
Xu He ◽  
Suying Cui ◽  
Xiaohui Zhao
Keyword(s):  
Wave Front ◽  
Adaptive Optics ◽  
Optical Communication ◽  
Free Space ◽  
Correction Method ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Hybrid Wave ◽  
Space Optical Communication

scholarly journals Compensation-free high-dimensional free-space optical communication using turbulence-resilient vector beams

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ziyi Zhu ◽  
Molly Janasik ◽  
Alexander Fyffe ◽  
Darrick Hay ◽  
Yiyu Zhou ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Optical Communication ◽  
Free Space ◽  
Scintillation Index ◽  
High Dimensional ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Differential Phase Shift ◽  
Spatial Modes ◽  
Space Optical Communication

AbstractFree-space optical communication is a promising means to establish versatile, secure and high-bandwidth communication between mobile nodes for many critical applications. While the spatial modes of light offer a degree of freedom to increase the information capacity of an optical link, atmospheric turbulence can introduce severe distortion to the spatial modes and lead to data degradation. Here, we demonstrate experimentally a vector-beam-based, turbulence-resilient communication protocol, namely spatial polarization differential phase shift keying (SPDPSK), that can reliably transmit high-dimensional information through a turbulent channel without the need of any adaptive optics for beam compensation. In a proof-of-principle experiment with a controllable turbulence cell, we measure a channel capacity of 4.84 bits per pulse using 34 vector modes through a turbulent channel with a scintillation index of 1.09, and 4.02 bits per pulse using 18 vector modes through even stronger turbulence corresponding to a scintillation index of 1.54.

scholarly journals Performance analysis of 349-element adaptive optics unit for a coherent free space optical communication system

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Leqiang Yang ◽  
Kainan Yao ◽  
Jianli Wang ◽  
Jingtai Cao ◽  
Xudong Lin ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Optical Communication ◽  
Free Space ◽  
High Speed ◽  
Large Scale ◽  
Mixing Efficiency ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Space Optical Communication ◽  
Continuous Surface

Abstract As a continuation of our previous work [Optics Express.25, 15229(2017)] in which we have verified the performance of a coherent free space optical communication (FSOC) system with a 97-element adaptive optics (AO) system, in this paper, we evaluated the performance improvement of the coherent FSOC system using a large-scale high-speed AO system with a 349-element continuous surface deformable mirror. The mixing efficiency (ME) and bit-error-rate (BER) under different Greenwood frequency (GF) were calculated as the performance metric of coherent FSOC system. The performance of FSOC system using such a large-scale AO system was quantitatively verified for the first time. The obtained results showed that the performance was obviously improved when a larger-scale high-speed AO system is employed in coherent FSOC system. This analysis result provides a performance verification for large-scale high-speed AO systems used in FSOC system which is beneficial for coherent FSOC system parameters design.

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