28 results about "Faraday rotator" patented technology

A Faraday rotator is a polarization rotator based on the Faraday effect, which in turn is based on a magneto-optic effect. It works because one polarization of the input light is in ferromagnetic resonance with the material which causes its phase velocity to be higher than the other. The plane of linearly polarized light is rotated when a magnetic field is applied parallel to the propagation direction.