Abstract: An optical control modulator comprises an input to receive light from a light source; a polarization divider to divide the light into two orthogonal plane-polarized light components; a Faraday material which, upon being energized, rotates the plane of polarization of the plane-polarized light as it passes through the material; and an output. The light travels through the Faraday material in opposite directions on a common path. In one embodiment, the light passes once through the Faraday material on a loop path. In another embodiment, the light passes twice through the Faraday material by being reflected by a mirror disposed at a back face of the Faraday material.