Optical Signal Processing via Cross Phase Modulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current optical repeater nodes require complex equipment and significant electric power due to frequent conversions between optical and electric signals, leading to inefficient energy use and increased complexity in optical communication systems.
Innovation Solution
An optical-signal processing apparatus that uses cross phase modulation by optically combining a modulated data signal with an optical carrier in a nonlinear optical medium, allowing for efficient data transmission without the need for frequent signal conversions, utilizing an oscillator, multiplier, optical modulator, and combiner to generate and propagate control light for cross phase modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If optical signals are processed by converting between optical and electric signals in repeater nodes, then signal processing and control can be performed, but equipment complexity increases and electric power consumption increases
Solution Approach 1:
The patent replaces the conventional optical-electric-optical conversion system with a purely optical processing system. Instead of converting optical signals to electric signals for processing and then back to optical signals, the invention uses optical phase modulation and cross-phase modulation directly in the optical domain, eliminating the need for complex electro-optical conversion equipment while maintaining signal processing capabilities
Solution Approach 2:
The patent introduces a local oscillator signal as an intermediary optical signal that enables phase modulation and cross-phase modulation. This local oscillator serves as a mediator to carry control information and enable optical signal processing without requiring direct electro-optical conversion, thus reducing equipment complexity while maintaining processing functionality
2Ease of operation
If optical signals are converted between optical and electric signals in repeater nodes, then signal processing can be performed, but electric power consumption increases significantly
Solution Approach 1:
The patent substitutes the energy-intensive electro-optical conversion process with purely optical processing mechanisms. By using optical phase modulation and cross-phase modulation directly on optical signals, the system eliminates the need for high-power electrical processing equipment, thereby significantly reducing electric power consumption while maintaining signal processing capability
Solution Approach 2:
The patent enables continuous optical signal processing without interruption for conversion. The optical signals undergo phase modulation and cross-phase modulation continuously in the optical domain, eliminating the energy losses and power consumption associated with repeated optical-electric-optical conversions, thus achieving more efficient continuous signal processing
3Productivity
If data are transmitted through dedicated light waves at terminal stations, then data can be collected and transmitted, but the system cannot efficiently handle data from arbitrary positions in the network
Solution Approach 1:
The patent creates a universal optical processing system where any node in the network can function as a repeater or processing point. By using optical phase modulation and cross-phase modulation, any node can modulate and retransmit optical signals carrying data from arbitrary positions, making the system adaptable to various network configurations and positions without requiring dedicated terminal stations for each location
Solution Approach 2:
The patent enables dynamic reconfiguration of data transmission paths by allowing nodes to dynamically modulate optical signals with data from arbitrary positions. The system can adaptively route and process signals through different nodes based on network requirements, providing flexible and dynamic transmission capability rather than fixed dedicated paths
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
This approach enables efficient data transmission from arbitrary positions in optical networks with reduced energy consumption and equipment complexity by minimizing signal conversions, facilitating optical frequency-division multiplexing on a single optical carrier.
Implementation Method 1
causing cross phase modulation of the optical carrier in the nonlinear optical medium
Data Source
AI summary
In an optical network system: control light is generated by optical modulation based on a modulated data signal which is generated by modulation of a carrier signal with a data signal; and the control light is optically combined with an optical carrier which is to propagate through a nonlinear optical medium, so as to cause cross phase modulation of the optical carrier with the control light in the nonlinear optical medium.