Ultrafast All Optical Parity Generator and Checker Based on Quantum dot Semiconductor Optical Amplifier

This investigation reports all optical parity generator and checker based on quantum dot semiconductor optical amplifiers at 200 Gb/s. The proposed circuit has been realized by using SOA-MZI configuration with quantum dot as active region in SOA. Parity generator consists of three inputs and utilizes 2 XOR logic while parity checker employs 3 XOR logic with 4 inputs. Cross phase modulation in SOA has been exploited in the design of XOR logic. MZI configuration converts phase modulation to amplitude modulation to achieve desired Boolean equation of XOR. Wide and clear eye diagram has been obtained with extinction ratio above 10 dB and Q factor of above 12. Obtained results validates feasibility and confirms practical implementation of proposed scheme.