NZ330670A - Processing optical digital signal, by modifying at least one bit in n-bit optical signal - Google Patents

Abstract

An optical digital signal 6, consisting of a temporal series of n bits is converted into n digital signals 1 - 4 (for a 4-bit signal). The signals 1 - 4 are delayed by intervals corresponding to 0 - 3 bits by delay lines 110 - 140. The signals are converted to a beams in parallel and in free space and passed through a selector that selects a particular bit preselected from the temporal series of n bits of each of the n optical signals. This transforms the temporal series of n bits into a spatial figure of the n bits. One bit of the spatial figure is modified, by inserting, eliminating, or modifying the form of the bit. The signals are processed using electro-optical modules 2000, 4000 and 7000, under the control of optical control signals 31 and 32.