Spatiotemporal vector optimization algorithm for arbitrary optical multi-beams generation with high energy...

Area of Science:

• Optical Engineering
• Satellite Communications
• Antenna Design

Background:

• Traditional laser communication terminals face single-link limitations.
• Passive phased array antennas struggle with low radiation efficiency and power loss in multi-beam generation.
• Satellite internet demands high-bandwidth, multi-user laser communication capabilities.

Purpose of the Study:

• To develop a spatiotemporal vector optimization algorithm for efficient multi-beam generation in satellite laser communication.
• To enhance energy utilization and radiation efficiency in liquid crystal optical phased array antennas.
• To overcome limitations of traditional laser terminals and passive phased array systems.

Main Methods:

• Proposed a spatiotemporal vector optimization algorithm for liquid crystal optical phased array antennas.
• Optimized phase offsets and power coefficients through iterative processes for precise beam shaping.
• Focused on arbitrary multi-beam generation with controlled intensity and elevation angles.

Main Results:

• Achieved over 80% diffraction efficiency when generating 90 arbitrary beams.
• Demonstrated system power loss below -1.28 dB.
• Showcased an average improvement of 12.33 dB in laser radiation efficiency.

Conclusions:

• The proposed algorithm significantly enhances energy utilization and laser radiation efficiency for multi-beam satellite communication.
• Improved signal-to-noise ratio and reduced power loss enable more robust and efficient satellite networks.
• Potential to reduce satellite node count, conserve power, and extend satellite operational lifespan.