Patent ID: 6577430
Filing Date: 2003-06-10
Classification: G02B,G02F

Abstract:
A reciprocal Faraday rotator assembly comprising:a) a first thin plate Faraday rotator formed of an optically transparent magnetic material and arranged for passing light beams along a path in a direction perpendicular to said thin plate Faraday rotator; b) means for applying a magnetic field in said light beam direction to said first thin plate Faraday rotator, whereby the angle of polarization rotation of said first thin plate Faraday rotator is reversed by reversing the direction of the magnetic field; c) a second thin plate Faraday rotator located along said beam path and formed of an optically transparent magnetic material and arranged for passing said light beams in a direction perpendicular to said second thin plate Faraday rotator, wherein the magnetization of said second thin plate Faraday rotator is maintained in a saturation state along said beam direction.