This work presents all-optical reversible gates based on semiconductor optical amplifier (SOA) in nonlinear loop optical mirror (NOLM). Two circuits namely Fredkin and Feynman logical operation are conducted and analyzed in terms of interferometric delay and bias currents of the SOA. The reversible gates are performed at 10?GHz data rate with narrow Gaussian pulses as input signals. Delay of 130 ps and injection current of 170?mA have displayed the finest outputs in the SOANOLM. Extinction ratio is greatly recorded, thus less noise interferes the logic operation in this simple technique. The SOANOLM also can be cascaded for other arithmetic signal processing units at high speed signal. Low power consumption at small signal gain has made the design versatile and viable to be implemented in photonic integration circuits for future ultrafast data handling over complex networks.
