Original Publication Date: 1979-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
In an electro-optic modulator having a periodic pattern of electrodes 14 and in which a low voltage is arranged to be applied to the electrodes to provide a periodic electric field in the region of total internal reflection of a light beam, there is a tendency for a diffraction pattern to be caused even when no voltage is applied. This is caused by the inherent diffraction grating effect of the periodic pattern of the electrodes 14. A second electrode 15 is, therefore, provided to which a high voltage is applied so as to generate a field to compensate for the inherent grating effect.