一种光通信编码与解码方法及其装置
By using a method for encoding and decoding spatiotemporal vortex beams, high-dimensional encoding and decoding are achieved with fewer spatiotemporal vortex states, solving the problem of vortex laser pulses carrying a single vortex, improving the rate and capacity of the communication system, and simplifying the device structure, making it suitable for multi-band communication.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
- Filing Date
- 2023-04-10
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, vortex laser pulses can only carry one vortex, making it difficult to achieve high-bit encoding and decoding. High-order spatial vortices are prone to splitting during long-distance transmission, affecting the bit error rate and causing difficulties.
The method of encoding and decoding spatiotemporal vortex beams is adopted. A specific phase pattern is generated by using a first diffraction element, a phase modulation element and an encoding controller. Multiple vortex states are carried by spatiotemporal vortex laser pulses for encoding, and decoding is performed by a decoding controller and an imaging element.
It achieves high-dimensional encoding and decoding using fewer spatiotemporal vortex states, improving communication speed, capacity and security. It has a simple structure, is economical and affordable, and is suitable for communication in different electromagnetic bands.
Smart Images
Figure CN116405121B_ABST