Patterned Retardation Plate Optical Vortex Mode Conversion
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Solution Overview
Problem
Current optical communication systems require complex reflective systems for mode conversion, resulting in low conversion efficiency.
Innovation Solution
A multiplexing optical communication system using a patterned retardation plate that converts incident light into optical vortices, incorporating a polarized light source, modulators, and a multiplexer, with phase difference patterns arranged to efficiently convert light into different modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a reflective optical system is used for mode conversion, then the optical communication system can convert between light modes, but the system complexity increases and conversion efficiency decreases
Solution Approach 1:
The patent extracts the mode conversion function from a complex reflective optical system and implements it using a simple patterned retardation plate. The retardation plate with specific phase difference patterns directly converts light modes without requiring multiple reflective components, thereby maintaining adaptability while reducing system complexity.
Solution Approach 2:
The patent replaces the mechanical reflective optical system with an optical phase modulation approach using a patterned retardation plate. Instead of using physical mirrors and reflective surfaces to convert modes, the system uses controlled phase differences introduced by the retardation plate to achieve mode conversion, significantly simplifying the device structure.
2Adaptability or versatility
If a reflective optical system is used for mode conversion, then the optical communication system can convert between light modes, but the conversion efficiency becomes low
Solution Approach 1:
The patent extracts the essential phase modulation function from the complex reflective system and implements it directly through a patterned retardation plate. This direct phase modulation approach minimizes energy loss by eliminating multiple reflection interfaces and complex optical paths, thereby improving conversion efficiency while maintaining mode conversion capability.
Solution Approach 2:
The patent changes the optical parameters (phase difference) directly through the retardation plate to achieve mode conversion. By controlling the phase difference patterns in the retardation plate, the system efficiently converts between different light modes without the energy losses associated with reflective systems, improving conversion efficiency.
3Productivity
If multiple phase difference patterns are provided in the same plane, then the multiplexing capability increases, but the device structure becomes more complex
Solution Approach 1:
The patent merges multiple phase difference patterns into a single patterned retardation plate structure. Instead of using separate components for different phase patterns, the invention integrates multiple patterns (e.g., radial, azimuthal, and combination patterns) into one device, enabling simultaneous or selective generation of different optical vortex modes while maintaining a compact structure.
Solution Approach 2:
The patterned retardation plate is designed with multi-functionality, capable of generating multiple phase difference patterns and corresponding optical vortex modes from a single device. By incorporating various pattern regions (radial, azimuthal, combination) in the same plane, the retardation plate can selectively produce different mode patterns, enhancing multiplexing capability without requiring multiple separate components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves a simple and high-efficiency optical communication system by effectively converting light into optical vortices, enhancing multiplexing capabilities and signal detection.
Implementation Method 1
a patterned retardation plate that converts light from the polarized light source into a plurality of optical vortices
Data Source
AI summary
According to the present invention, a multiplexing optical communication system including a simple and high-efficiency optical system can be provided. The optical communication system includes an optical transmitter, a transmission path, and an optical receiver, in which the optical transmitter includes a polarized light source, a polarizing plate, a patterned retardation plate that converts light from the polarized light source into a plurality of optical vortices, a modulator, and a multiplexer.