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In this video, I will explain what is a Fiber Optic Isolator.
The picture at the left shows some fiber optic isolator products.
So what is a fiber optic isolator? Isolator is an optical component that allows the transmission of light in only one direction. The light is completely blocked in the other direction.
Isolators are used to prevent unwanted feedback into lasers. So the laser's operation is not disturbed by the feedback from the fiber optic system.