Faraday Rotator Single Mode Fiber

Some glasses and other materials are optically active only in the presence of a magnetic field where the plane of polarized light is rotated. This property is called the Faraday effect. The rotation angle/unit of magnetic field and optical path length is called the Verdet constant (V). The rotation angle 8F defined as @F = V iHdL where H = magnetic flux and L = fiber length.