Terbium oxide for use as a Faraday rotator

Faraday rotator based on the use of Tb Previously known optical isolators are limited by the Verdet constant of the material used as a Faraday rotator: in order to achieve the desired rotation of the polarization plane of the incident light, the product of magnetic field strength of Rotatormaterials times must length achieve a certain value. By increasing the Verdet constant, this value can be reduced. The materials Tb This leads to the desired high Verdet constants, thereby enabling the construction of low-cost and compact insulators which have the feature that they comprise a Faraday rotator from Tb