Short-Wavelength Optical Power Supply for Higher Photoelectric Conversion
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Solution Overview
Problem
Existing optical power supply systems require improvements in photoelectric conversion efficiency at both the power supplying and receiving sides to enhance overall efficiency.
Innovation Solution
Employing semiconductor materials with short laser wavelengths (500 nm or less) and high band gaps (2.4 eV or greater) in semiconductor lasers and photoelectric conversion elements, such as diamond, gallium oxide, and aluminum nitride, to improve photoelectric conversion efficiency at both the power supplying and receiving ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional optical power supply systems are used, then the system can transmit power optically, but the photoelectric conversion efficiency at both power supplying and receiving ends is insufficient
Solution Approach 1:
The patent changes the wavelength parameter of the optical carrier to 500 nm or shorter (blue-violet region), which fundamentally alters the photoelectric conversion characteristics. This parameter change enables both the light source and photovoltaic element to operate at optimal wavelengths, simultaneously improving conversion efficiency at both transmitting and receiving ends, thereby resolving the energy loss issue without sacrificing overall system efficiency
Solution Approach 2:
The patent employs composite material strategies by selecting specific photovoltaic elements (such as GaN-based materials) that are optimized for blue-violet light absorption. This material selection creates a matched system where the light source wavelength and photovoltaic absorption characteristics are optimally aligned, achieving high photoelectric conversion efficiency at both ends of the transmission path
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
Enhances photoelectric conversion efficiency at both the power supplying and receiving ends, thereby improving the overall optical power supply efficiency.
Implementation Method 1
a semiconductor laser that oscillates with electric power to output feed light
Implementation Method 2
a photoelectric conversion element that converts the feed light into electric power
Data Source
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AI summary
A power sourcing equipment (PSE) device (110) of an optical power supply system (1A, 1, 1B) includes a semiconductor laser (111) that oscillates with electric power, thereby outputting feed light. The semiconductor laser includes a semiconductor region exhibiting a light-electricity conversion effect. A semiconductor material of the semiconductor region is a laser medium having a laser wavelength of 500 nm or less. A powered device (310) of the optical power supply system includes a photoelectric conversion element (311) that converts feed light into electric power. The photoelectric conversion element includes a semiconductor region exhibiting a light-electricity conversion effect. A semiconductor material of the semiconductor region is a laser medium having a laser wavelength of 500 nm or less.