Simultaneous optical signal extracting and erasing based on four-wave mixing in optical fiber

A simultaneous optical signal extracting and erasing scheme is presented by utilizing four-wave mixing (FWM) in optical fiber. Two synchronized gate and negation gate pulses are used as control signal, which are coupled with data stream and produce FWM effect in high nonlinear fiber (HNLF). Through filtering the idler light generated between each control signal and data stream, simultaneous signal extracting and erasing functions can be obtained. Experimental results are successfully demonstrated with NRZ data format at 10 Gbit/s. This system is able to operate at higher bit rates and other data modulation formats.