Abstract
When the light passes through the magnetic fluid film in the magnetic field, double refraction occurs along with polarizing of the light. Therefore, by controlling the intensity of the magnetic field, it is possible to give arbitrary polarization to the transmitted light. The phase difference due to this phenomenon can be measured by means of heterodyne with a transverse Zeeman laser. This difference is observed to exceed 180 deg. in some cases and the response of the phase shift to the variation of magnetism attains to 5kHz, where the switching interval is less than 0.4ms. One applicative attempt is performed to realize an element for dividing the incident light in two directions with the intensity ratio of 98 to 2.
