Photonics-Aided Vector Terahertz Signal Generation
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Solution Overview
Problem
Current terahertz signal generation methods for photonics-aided vector communication systems are limited by high costs, power consumption, and complexity, particularly due to the need for high-performance digital analog converters and arbitrary waveform generators, which restrict the development of future high-speed 5G and 6G mobile communication networks.
Innovation Solution
A photonics-aided vector terahertz signal communication system that uses an optical frequency comb generation module, a vector terahertz signal generation module, and a vector terahertz signal detection module, where binary data is used to perform amplitude modulation on optical frequency combs without requiring digital analog converters, utilizing intensity and phase modulators to generate stable terahertz signals with adjustable frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional digital analog converters and arbitrary waveform generators are used for terahertz signal generation, then signal generation capability is achieved, but system cost and power consumption increase significantly
Solution Approach 1:
The patent replaces electronic signal generation devices (digital analog converters and arbitrary waveform generators) with an optical-based signal generation system. Specifically, it uses an optical frequency comb generator combined with intensity modulators to generate terahertz signals directly from optical domains, eliminating the need for complex electronic waveform generation equipment while maintaining signal generation capability.
2Measurement precision
If high-performance digital analog converters are used, then signal conversion accuracy is improved, but power consumption and device cost increase
Solution Approach 1:
The patent substitutes electronic signal conversion processes with optical modulation processes. By using intensity modulators driven by optical frequency combs, the system achieves accurate signal conversion in the optical domain, avoiding the high power consumption associated with high-performance digital analog converters operating in the electronic domain.
3Device complexity
If electronic devices with limited bandwidth are used, then device simplicity is maintained, but transmission speed and data rate are restricted
Solution Approach 1:
The patent changes the operating domain from electronic frequencies to optical frequencies. By generating terahertz signals through optical frequency combs and intensity modulation, the system achieves bandwidths exceeding 100 GHz, far beyond the limitations of electronic devices, while maintaining relatively simple device structures through the use of standard optical 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 generates terahertz signals with stable frequencies and reduced phase noise, eliminating the need for expensive digital analog converters and arbitrary waveform generators, enabling efficient high-capacity and high-speed communication suitable for future 5G and 6G mobile networks.
Implementation Method 1
an optical frequency comb generation module configured to generate M optical frequencies
Implementation Method 2
a photoelectric detector configured to perform photoelectric detection on the M optical frequencies
Implementation Method 3
an intensity modulator configured to perform intensity modulation on the optical signal based on a drive signal
Data Source
AI summary
The present disclosure provides a photonics-aided vector terahertz signal communication system. The system includes an optical frequency comb generation module, a vector terahertz signal generation module, an optical fiber transmission module, a vector terahertz signal detection module, and a vector terahertz signal emission module that are sequentially connected, where the vector terahertz signal generation module includes a first binary sequence generator, a first electronic amplifier, and a first intensity modulator that are sequentially connected, the first binary sequence generator generates binary data representing to-be-transmitted data, the first intensity modulator performs, based on the binary data, amplitude modulation on an optical frequency comb entering the first intensity modulator, and an optical signal obtained after the modulation of the first intensity modulator is a vector terahertz signal carrying the to-be-transmitted data. In the present disclosure, a vector terahertz signal can be generated by using an intensity modulator.