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Adaptive turbulence compensation with a hybrid input-output algorithm in orbital angular momentum-based free-space
Applied Optics
|November 22, 2018
Summary
Atmospheric turbulence distorts orbital angular momentum (OAM) beams in free-space optical (FSO) communication. A novel hybrid input-output algorithm (HIOA)-based adaptive optics system effectively compensates for these distortions, improving communication performance.
Area of Science:
- Optical communication systems
- Adaptive optics
- Free-space optical communication
Background:
- Atmospheric turbulence significantly degrades orbital angular momentum (OAM)-based free-space optical (FSO) communication by causing intermodal crosstalk.
- Distorted OAM beams lead to reduced system performance and reliability in FSO links.
Purpose of the Study:
- To propose and analyze a hybrid input-output algorithm (HIOA)-based adaptive optics (AO) system for compensating distorted OAM beams in FSO communication.
- To evaluate the effectiveness of the HIOA-based AO system in mitigating turbulence-induced distortions.
Main Methods:
- Development and simulation of an HIOA-based AO system tailored for OAM-based FSO communication.
- Comparative analysis of HIOA performance against the traditional Gerchberg-Saxton algorithm.
- Investigation of different probe beam types (OAM vs. Gaussian) for turbulence compensation.
Main Results:
- The HIOA-based AO system effectively corrects distorted OAM beams in simulated FSO environments.
- HIOA demonstrates superior compensation performance and faster convergence compared to the Gerchberg-Saxton algorithm.
- An OAM beam with state l=1 as a probe beam yields superior correction results over a Gaussian beam.
Conclusions:
- The HIOA is a feasible and effective method for adaptive turbulence compensation in OAM-based FSO communication systems.
- This research offers valuable insights for enhancing the robustness and efficiency of OAM communication technologies.
- The choice of probe beam significantly impacts the performance of AO-based turbulence compensation.
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