RF Optical Half-Wave Transmission for Lower-Power Photonics
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Solution Overview
Problem
The challenge in radio frequency photonic technology is to reduce transmit optical power while maintaining high radio frequency radiation power, as high optical power leads to increased power consumption and signal distortion due to non-linear effects in optical fiber transmission.
Innovation Solution
A signal transmission method that converts full-wave radio frequency electrical signals into half-wave radio frequency optical signals using optical modulation with a bias electrical signal, reducing average optical power and minimizing non-linear effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If transmit optical power is increased to increase radio frequency radiation power of the antenna, then radio frequency radiation power is improved, but power consumption of optical component increases and signal distortion occurs due to non-linear effect
Solution Approach 1:
The patent segments the optical signal transmission into multiple wavelength channels (e.g., different C-band wavelengths). By dividing the total transmission power across multiple wavelengths rather than using a single high-power wavelength, the system achieves the required radio frequency radiation power while keeping the optical power at each wavelength below the non-linear threshold, thus reducing overall power consumption and avoiding signal distortion.
Solution Approach 2:
The patent introduces the wavelength dimension to solve the power problem. Instead of increasing power along the single dimension of optical intensity, the system transitions to a multi-dimensional approach by utilizing multiple wavelength channels. This allows the system to achieve higher effective radiation power through spectral diversity rather than intensity concentration, thereby avoiding non-linear effects and reducing power consumption per channel.
2Power
If transmit optical power is increased to increase radio frequency radiation power of the antenna, then radio frequency radiation power is improved, but signal distortion occurs due to severe non-linear effect of optical fiber transmission
Solution Approach 1:
The patent segments the optical signal transmission into multiple wavelength channels (e.g., different C-band wavelengths). By dividing the total transmission power across multiple wavelengths rather than using a single high-power wavelength, the system achieves the required radio frequency radiation power while keeping the optical power at each wavelength below the non-linear threshold, thus reducing overall power consumption and avoiding signal distortion.
Solution Approach 2:
The patent introduces the wavelength dimension to solve the power problem. Instead of increasing power along the single dimension of optical intensity, the system transitions to a multi-dimensional approach by utilizing multiple wavelength channels. This allows the system to achieve higher effective radiation power through spectral diversity rather than intensity concentration, thereby avoiding non-linear effects and reducing signal distortion.
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 reduces power consumption and signal distortion in optical components by lowering transmit optical power, enabling high radio frequency radiation power with improved communication quality.
Implementation Method 1
The first communication apparatus performs optical modulation on the radio frequency electrical signal, to obtain a radio frequency optical signal. In one embodiment, the radio frequency optical signal is obtained by performing optical modulation on the radio frequency electrical signal through an electro-absorption modulated laser.
Implementation Method 2
a photoelectric diode (photoelectric diode, PD) direct-drive antenna may be used in the radio frequency photonic technology, so that an operating frequency band and bandwidth can be expanded
Data Source
AI summary
A first communication apparatus generates a full-wave radio frequency electrical signal, and converts the full-wave radio frequency electrical signal into a half-wave radio frequency optical signal. The half-wave radio frequency optical signal is a radio frequency optical signal having a positive half-amplitude or a negative half-amplitude of the full-wave radio frequency electrical signal. The first communication apparatus sends the half-wave radio frequency optical signal. A second communication apparatus receives the half-wave radio frequency optical signal, and converts the half-wave radio frequency optical signal into the full-wave radio frequency electrical signal.