Beam Scanning and Capture of Micro Laser Communication Terminal Based on MEMS Micromirrors

Area of Science:

• Space optical communication
• Satellite technology
• Micro-electromechanical Systems (MEMS)

Background:

• Growing demand for microminiature laser communication terminals for satellite Internet constellations.
• Miniaturized terminals require smaller, efficient drive components for on-orbit scanning and capture.
• Susceptibility of laser communication terminals to initial pointing accuracy and satellite microvibrations.

Purpose of the Study:

• To propose a novel laser scanning-capture model for microminiature laser communication terminals.
• To address the challenges of size, weight, and power (SWaP) constraints.
• To enhance the reliability and efficiency of satellite laser communication networks.

Main Methods:

• Development of a laser scanning-capture model utilizing a Micro-electromechanical Systems (MEMS) micromirror.
• Implementation of a scanning overlap factor to improve capture probability.
• Experimental analysis to validate the proposed model's effectiveness.

Main Results:

• The MEMS-based model provides fast, large-scale scanning analysis.
• The scanning overlap factor significantly improves capture probability under microvibration conditions.
• Experimental results confirm the model's effectiveness in addressing pointing accuracy and microvibration issues.

Conclusions:

• The proposed laser scanning-capture model offers a viable solution for future ultra-long-distance microspace laser communication.
• It establishes a theoretical foundation for developing robust and efficient laser communication terminals.
• The model contributes to the advancement of satellite Internet constellations and space-based communication networks.