Simultaneous demonstration on FWM-bases all-optical 40 Gbit/s multicasting CSRZ-DPSK logic XOR gate and CSRZ-DPSK to RZ-DPSK format conversion

We propose logic XOR gate and format conversion for carrier-suppressed return-to-zero differential phase-shift keying (CSRZ-DPSK) signals using non-degenerate four-wave mixing (FWM) in a highly nonlinear fiber (HNLF). Due to the linear relationship of the complex amplitudes between output and input optical waves, the three generated idler waves by three non-degenerate FWM processes take the return-to-zero differential phase-shift keying (RZ-DPSK) format and the logic XOR result of three input CSRZ-DPSK signals. All-optical 40 Gbit/s multicasting CSRZ-DPSK logic XOR operation and CSRZ-DPSK to RZ-DPSK format conversion are simultaneously demonstrated in the experiment.