ALL OPTICAL LOGIC GATE IMPLEMENTING NOR FUNCTION AND CASCADED NOR/AND FUNCTION

摘要

An optical logic element arranged to combine two input signals A and B and provide an output 'signal out comprise a semiconductor optical amplifier (SOA) having a first end and a second end, a first input port (100) connected to a first end of the SOA for receiving the first input signal A, a second input port (101) also connected to the first end of the SOA for receiving the second input signal B, a third input port (105) connected to the second, opposite, end of the SOA for receiving and optional counter propagating CW signal, a fourth input port (102) also connected to the second end of the SOA for receiving a probe signal, and an output port (1-4) connected to the first end of the SOA which receives an output signal from the first end of the SOA, which signal when read during the application of the probe signal is representative of the logical output C of the logic gate.