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Average capacity optimization in free-space optical communication system over atmospheric turbulence channels with
Chao Liu1, Yong Yao, Yun Xu Sun
1Department of Electronic and Information Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, Guangdong 518055, China.
Optics Letters
|October 5, 2010
Summary
Optimize free-space optical (FSO) channel capacity by tuning transmitter beam divergence and waist. Optimum values depend on jitter and wavelength, aiding FSO system design.
Area of Science:
- Optical Communications
- Wireless Communication Systems
- Signal Processing
Background:
- Free-space optical (FSO) communication is susceptible to atmospheric turbulence and pointing errors, which degrade performance.
- Optimizing channel capacity is crucial for efficient data transmission in FSO systems.
Purpose of the Study:
- To develop a model for average capacity optimization in FSO channels.
- To investigate the impact of atmospheric turbulence and pointing errors on FSO capacity.
Main Methods:
- Proposed a mathematical model to analyze average capacity.
- Investigated the influence of transmitter beam divergence angle and beam waist.
- Considered the effects of atmospheric turbulence and pointing errors.
Main Results:
- Identified transmitter beam divergence and beam waist as key parameters for capacity maximization.
- Demonstrated that optimal parameter values are dependent on jitter and operating wavelength.
- Showcased the trade-offs between different design choices for FSO systems.
Conclusions:
- The study provides a method for optimizing average capacity in FSO systems.
- Tuning beam divergence and waist offers a viable strategy for enhancing FSO performance.
- Findings are valuable for the practical design and deployment of FSO communication links.
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