Optical Coupling Apparatus Using Visible Light for High-Speed Transmission
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Solution Overview
Problem
Existing infrared-based optical coupling apparatuses have a relatively low upper limit of operating frequency, which fails to meet the demands of high-speed data transmission required in the industrial Internet.
Innovation Solution
An optical coupling apparatus utilizing a monochromatic light source and photodetector with a wavelength shorter than infrared light, such as blue or ultraviolet light, and a transmission medium with specific transmittance and permittivity thresholds, along with a reflective material and a concave light source base, to enhance photon energy and frequency capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If infrared light is used as the carrier for signal transmission, then the optical coupling apparatus can achieve good electrical insulation and anti-interference ability, but the upper limit of operating frequency is relatively low
Solution Approach 1:
The patent changes the fundamental parameter of light wavelength from infrared to visible light (blue, green, or red). This parameter change enables the photodetector to respond at higher frequencies while the optical coupling structure maintains electrical insulation. The visible light wavelength is shorter than infrared, providing higher photon energy and faster detection response, thus resolving the contradiction between reliability and operating frequency.
2Speed
If the wavelength of light is shortened to increase photon energy and operating frequency, then the upper limit of operating frequency increases, but the transmittance of light in the transmission medium may be reduced
Solution Approach 1:
The patent selects specific visible light wavelengths (blue, green, or red) that optimize both operating frequency and transmission characteristics. By changing the wavelength parameter within the visible range, the system achieves high operating frequencies while maintaining adequate transmittance through proper material selection and wavelength optimization.
Solution Approach 2:
The patent applies different optimization strategies to different parts of the system. The light source and photodetector are optimized for high-frequency response, while the transmission medium is selected or designed to have high transmittance at the specific visible light wavelength used. This local optimization resolves the contradiction between frequency and transmission loss.
3Reliability
If a monochromatic light source with shorter wavelength is used, then photoelectric conversion efficiency improves, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent changes the light wavelength parameter to visible range while using commercially available LED or laser diode sources. This parameter change improves photoelectric conversion efficiency compared to infrared, while the use of standard visible light sources keeps manufacturing complexity manageable through off-the-shelf component selection.
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 solution enables a higher upper limit of operating frequency, improved photoelectric conversion efficiency, and effective electrical insulation, meeting the requirements for high-speed data transmission while reducing production costs and complexity.
Implementation Method 1
a monochromatic light source, configured to emit monochromatic light
Implementation Method 2
a monochromatic light photodetector, configured to receive the monochromatic light
Implementation Method 3
a reflective material surrounding at least a portion of an outer surface of the monochromatic light transmission medium, wherein a reflection coefficient of the reflective material to the monochromatic light is greater than a predetermined reflection coefficient threshold
Data Source
AI summary
An optical coupling apparatus is disclosed, including: a monochromatic light source configured to emit monochromatic light; a monochromatic light photodetector configured to receive the monochromatic light; and a monochromatic light transmission medium, wherein at least a portion of the monochromatic light transmission medium is disposed between the monochromatic light source and the monochromatic light photodetector, and the monochromatic light is transmitted to the monochromatic light photodetector via the monochromatic light transmission medium, wherein a wavelength of the monochromatic light is shorter than a wavelength of infrared light. Embodiments of the present disclosure provide an optical coupling apparatus with a higher upper limit of operating frequency, which may better meet user requirements.