Wang, Q., Zhu, G., Chen, H., Jaques, J., Leuthold, J., Piccirilli, A.B., Dutta, N.K.: Study of all-optical XOR using Mach-Zehnder interferometer and differential scheme. Singh, S.: Lovekesh: Ultrahigh speed optical signal processing logic based on SOA-MZI. Malhotra, N., Anand, S., Raghav, P.K.: Simulation of logic gates for digital optical networks using SOA. Hui, J.Y., Cheung, K.-W.: Optical versus electronic switching for broadband networks. Saleh, A.A.M., Simmons, J.M.: All-Optical networking-evolution, benefits, challenges, and future vision. The proposed design could find application in implementation of multistage arithmetic logic units. The design showed good performance up to 60 Gbps. The optical signal-to-noise ratio, bit error rate (BER), and Q-factor values were evaluated for different data rates. The proposed cascaded adder was simulated in OptiSystem. The nonlinear effects in the SOA device are used to implement different logic operations. They have high thermal stability and require low power.
We propose herein an all-optical cascaded adder whose elementary blocks are a half-adder and full-adder, designed using semiconductor optical amplifier (SOA)-based Mach–Zehnder interferometer (MZI) gate configurations. All-optical logic gates represent the best solution to realize both combinational as well as sequential devices in the optical domain, representing the basic building blocks for optical computing circuits. With the performance enhancements in all-optical signal processing and switching schemes in terms of data rate and processing speed, various devices enabled with all-optical operation are becoming primary requirements for current and future telecommunications and data networks.
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