Adaptive optics and ground-to-space laser communications.

Area of Science:

• Optical Engineering
• Free-space Optical Communication

Background:

• Laser communication systems are susceptible to atmospheric turbulence, causing signal fade and surge.
• Adaptive optics (AO) systems can potentially mitigate these effects by compensating for atmospheric distortions.

Purpose of the Study:

• To investigate the relationship between laser communication system parameters and adaptive optics system parameters.
• To quantify the benefits of AO in improving optical signal propagation for space-to-ground links.

Main Methods:

• Analysis of optical signal fade and surge in relation to atmospheric log-amplitude variance.
• Development of expressions linking AO system performance to the reduction of log-amplitude variance.
• System-level examination of AO effects on signal propagation.

Main Results:

• Adaptive optics systems can compensate for atmospheric turbulence with a few degrees of freedom.
• AO integration leads to a significant reduction in optical signal fade and surge.
• Demonstrated advantageous reduction in signal fade and surge through system-level examples.

Conclusions:

• Adaptive optics are crucial for enhancing the reliability of free-space laser communication.
• AO systems offer a viable solution for mitigating atmospheric impairments in optical links.
• The study provides a framework for evaluating AO performance in laser communication systems.