The work has been focused on the XOR, AND, OR logic gate implementation, since it is a very versatile approach for implementing many functions in optical networks. The development and study of a novel architecture based on cascaded SOA-MZIs to perform the logic XOR operation between two input binary sequences. The experimental implementation and operation demonstration of the optical XOR logic gate at 10 Gbit/s. The extension and study of the SOA-MZI based logic-gate devices to perform other functions, like AND and OR operations with minor changes in the initial architecture.
Finally, as an application of SOA-MZI wavelength convertor and all-optical composite logic gates with XOR, OR and AND functions using two parallel SOA-MZI structures are proposed and verified. The proposed design is optimized by adjusting the optical power, SOA bias current and phase differences in two SOA-MZI structures to obtain output pulses with maximum ER.