Patent ID: 7085029
Filing Date: 2006-08-01
Classification: G02F,H03K

Abstract:
1. A programmable logic device for use with input signals having a periodic waveform of substantially fixed frequency, said device providing a logical output from said input signals and comprising: (a) at least two inputs each for receiving an optical data signal having one of a predetermined set of values, wherein at least two of said inputs are phase modulated; (b) an additional input for receiving an additional optical signal; (c) a combiner stage for combining the data signals into a combined signal having one of a plurality of magnitude states and further photonically combining said combined signal with said additional signal to produce an intermediate signal therefrom, the photonic combination of said combined signal with said additional signal performing a phase operation to modify the magnitude of the intermediate signal; (d) a filter stage for receiving said intermediate signal and to perform a magnitude operation to modify the magnitude of the intermediate signal to map said intermediate signal to a corresponding one of a set of conditional states to produce a conditioned signal; and (e) an output stage for passing said conditioned signal to an output.