Wide Bandgap Semiconductor Detectors for High-Temperature Optical Communication
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Solution Overview
Problem
Conventional data communication systems are inadequate for high-temperature and harsh environments, as they are susceptible to electromagnetic interference, lightning damage, and have limitations in operating above 125°C due to material degradation and low signal-to-noise ratios.
Innovation Solution
The use of short wavelength optical signals combined with wide bandgap semiconductor electronics, such as silicon carbide, gallium nitride, and aluminum gallium nitride, to enable optical communication systems that operate effectively at temperatures above 125°C and in harsh environments with high electrical noise and electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrical conductors (copper) are used for data communication, then the system can operate in benign environments, but the system has significant mass, is susceptible to electromagnetic interference and lightning damage
Solution Approach 1:
The patent replaces electrical conductors (mechanical/electrical system) with optical fibers (optical system) for data transmission. This substitution eliminates the mass and electromagnetic susceptibility of copper cabling while maintaining data communication functionality through light-based transmission.
Solution Approach 2:
The patent introduces optical fibers as an intermediary medium to transmit data without direct electrical contact. The optical fiber acts as a mediator that carries information through light pulses, isolating the communication path from electromagnetic interference and lightning effects that plague electrical conductors.
2Temperature
If traditional optical communication systems using glass and polymeric fibers are used, then the system can operate in ambient conditions, but the system cannot operate at temperatures above 125°C due to material degradation
Solution Approach 1:
The patent changes the material parameters of the detector from conventional silicon-based materials to wide bandgap semiconductor materials. This parameter change enables the detector to withstand temperatures above 125°C while maintaining acceptable signal-to-noise ratios, as the wide bandgap materials have higher thermal stability and lower dark current generation at elevated temperatures.
Solution Approach 2:
The patent employs composite material strategies by combining wide bandgap semiconductor materials with appropriate packaging and protection structures. This composite approach creates a detector system that can operate reliably in high-temperature environments while maintaining optical detection capabilities.
3Measurement precision
If infrared devices are used for optical communication, then the system can operate at lower temperatures, but the system experiences low signal-to-noise ratios and cannot distinguish between received light and background electrons at higher temperatures
Solution Approach 1:
The patent changes the detection wavelength parameter from infrared to visible or ultraviolet ranges by using wide bandgap semiconductor detectors. This parameter change allows the system to operate at higher temperatures because these materials have lower thermal generation of background electrons at elevated temperatures, improving the ability to distinguish received light from thermal noise.
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 solution provides reliable and efficient optical communication systems that are resistant to electromagnetic interference, lightweight, and capable of operating in extreme temperatures, suitable for industrial applications like aircraft and satellite systems, with communication speeds ranging from 100 Kbps to 50 Mbps.
Implementation Method 1
a detector for detecting the electromagnetic emissions from the transmission medium. The light detector comprises a wide bandgap semiconductor material and/or component.
Implementation Method 2
a light source for emitting electromagnetic emissions
Data Source
AI summary
Systems and methods for optical data communication in high temperatures and harsh environments are provided herein. The embodiments utilize a combination of a short wavelength light source combined with a wide bandgap detector in order to transmit optical signals. An optical data communication system may include a light source connected to a light detector via an optical fiber. The light source and the light detector may also be physically adjacent to any dielectric gap that can be spanned without having an optical fiber intermediary.