What is a Faraday Isolator?

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- everything RF

Dec 2, 2018

A Faraday Isolator is a device that isolates the laser source from an optical system, to protect the laser source from reflections. It uses the magneto-optic rotation phenomenon to protect the laser source from reflections that can damage the operation of the laser system.

A Faraday Isolator basically acts as an optical diode allowing the propagation of light in only one direction. A typical Faraday isolator is made up of a Faraday rotator, two polarizers, and a body to house the parts.