An optical isolator, or optical diode, is an optical component which allows the transmission of light in only one direction. They are typically used to prevent unwanted feedback into an optical oscillator, such as a laser cavity. The operation of the device depends on the
Faraday effect (which in turn is produced by
magneto-optic effect), which is used in the main component, the
Faraday rotator.
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A device that uses a short optical
transmission path to accomplish electrical isolation between elements of a
circuit. Note 1: The optical path may be air or a
dielectric waveguide. Note 2: The transmitting and receiving elements of an optical isolator may be contained within a single compact
module, for mounting, e.g., on a circuit board. Synonym optoisolator.
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