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Photonics Dictionary

Faraday rotation

The effect discovered by Faraday in 1845 whereby nonoptically active materials or substances become capable of rotating the polarization plane of polarized radiation (light) passed through them when placed into a strong magnetic field with a component in the direction of rotation. One of the most familiar optical instruments utilizing this effect is the Faraday rotator; one well-known present-day application is in the protective devices used to prevent the destruction of high-power laser systems by backreflections from the target or other "downstream'' system points. Also known as Kundt effect or magnetic rotation.
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Faraday rotation

Presented by Eric Zhang, Princeton University


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