Patent ID: 9304337
Filing Date: 2016-04-05
CPC Classification: G02F

Claim Text:
1. A Faraday rotator, comprising: first and second planar magnet-subassemblies spaced apart and parallel to each other forming a gap therebetween, with a propagation-axis of the rotator extending through the gap; each of the magnet subassemblies including a first bar-magnet magnetized in a direction parallel to the propagation axis, the first bar-magnet being sandwiched between second and third bar-magnets magnetized in a direction perpendicular to the propagation axis and perpendicular to the gap, the first bar-magnets of the magnet subassemblies being magnetized in the same direction, the second bar-magnets being magnetized in opposite directions toward each other and the third bar-magnets being magnetized in opposite directions away from each other; a magneto-optic crystal located in the gap on the propagation axis; a temperature control element located outside of said gap; and a thermal conductor, extending from the temperature control element into the side edge of the gap, between the magnets and in a direction perpendicular to the propagation axis, said thermal conductor being in thermal communication along a side of crystal exposed by the gap.