| 摘要 |
<p>An optical control modulator comprises an input to receive light from a light source, a polarisation divider to divide the light into two orthogonal plane-polarised light components and a Faraday material which upon being energised rotates the plane of polarisation of the plane-polarised 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.</p> |
