A lightning switch

A diffraction pattern (or "Fourier hologram") can then be generated using the miniature ferroelectric liquid crystal display and the data signal routed into the appropriate output fibre by varying the angle of diffraction generated at the liquid crystal hologram. The angle of deflection is determined by the hologram pattern, and it is extremely accurate, down to a fraction of a degree.

An infinite number of permutations is possible so that a large number of switch connections can be incorporated onto a single device allowing switching from one array of input channels to an array of output channels.

For further information please contact Professor Bill Crossland - wac@eng.cam.ac.uk.