Encoding and decoding communications based on superimposed-state double-ring perfect vortex beam arrays.

Area of Science:

• Optical physics
• Information technology
• Applied optics

Background:

• Perfect vortex beam arrays (PVBAs) offer potential for optical communication.
• Existing methods may have limitations in data capacity and transmission accuracy.

Purpose of the Study:

• To propose and validate a novel encoding/decoding scheme for high-capacity optical communication using superimposed-state double-ring perfect vortex beam arrays (SDR-PVBAs).

Main Methods:

• SDR-PVBAs were generated using the displacement theorem of the Fourier transform.
• 256 distinct morphologies of double rings were encoded using hexadecimal values (00-FF).
• A residual network (ResNet) was utilized for recognizing superposition modes and decoding information.

Main Results:

• Successful transmission of a 180x180 pixel grayscale image.
• Accurate image recovery with a recognition accuracy of 99.926% after decoding via ResNet.
• Demonstrated the feasibility of SDR-PVBAs for high-capacity optical communication.

Conclusions:

• The proposed SDR-PVBA scheme enables high-capacity optical communication.
• ResNet effectively decodes information transmitted via SDR-PVBAs.
• This research expands the application of PVBAs in advanced communication systems.