Optoisolators
Optoisolators are optical components that allow light signals to propagate in only one direction, while completely blocking the other direction. It is mainly composed of three components: polarizer, Faraday rotator and polarizer. For the forward incident signal light, which becomes linearly polarized after passing through the polarizer, the Faraday gyromagnetic medium together with the external magnetic field rotates the polarization direction of the signal light by 45 degrees to the right, and precisely makes the low loss pass through the polarizer placed at 45 degrees from the polarizer. For the reverse light, when the linearly polarized light of the polarizer passes through the placing medium, the deflection direction is also rotated to the right by 45 degrees, so that the polarization direction of the reverse light is orthogonal to the direction of the polarizer, and the transmission of the reflected light is blocked.
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Optoisolators: Optoisolators are widely used in many fields such as optical fiber communication systems, laser technology, industrial automation and instrumentation due to their unique isolation characteristics. For example, in the field of optical fiber communication systems, optical isolators are used to solve the reflection problem between optical devices, prevent reflected signals from interfering with the transmission of normal optical signals, and improve the purity and transmission quality of optical signals. In laser treatment and surgical instruments, optical isolators can isolate optical damage and safety accidents caused by reflected light to ensure the transmission accuracy and stability of instruments; In power electronic converters, in the field of industrial automation and instrumentation, optical isolators can isolate sensors and controllers to prevent electrical and noise interference from affecting system stability and accuracy; In precision instruments, optical isolators can isolate thermal disturbances and optical noise between the detector and the light source, improving test accuracy and accuracy.
