Articles written in Pramana – Journal of Physics
Volume 96 All articles Published: 25 April 2022 Article ID 0085 Research Article
Numerical demonstration of NAND and XNOR Boolean functions using quantum-dot semiconductor optical amplifiers-based turbo-switched Mach–Zehnder interferometers and delayed interferometer at 1 Tb/s
AMER KOTB KYRIAKOS E ZOIROS WEI LI
For the first time to our knowledge, the turbo-switched Mach–Zehnder interferometers (TS-MZIs) architecture, which includes quantum-dot semiconductor optical amplifiers (QDSOAs) and is followed by a series delayed interferometer (DI), is used in a combined scheme (QDSOAs-TS-MZIs-DI) to realise NOT-AND (NAND) and exclusive-NOR (XNOR) Boolean functions at a rate of 1 Tb/s return-to-zero data. The performance of the two considered gates is evaluated by calculating and comparing the quality factor and the cross-correlation coefficient for the QDSOAs-TS-MZIs-DI, the TS-MZIs with QDSOAs but without DI (QDSOAs-TS-MZIs) and the standard MZIs with QDSOAs (QDSOAs-MZIs). The comparison shows the superiority of the QDSOAs-TS-MZIs-DI over the other two alternatives (QDSOAs-TS-MZIs and QDSOAs-MZIs) and hence suggests that it should be preferred as a switching module when executing the NAND and XNOR Boolean functions at 1 Tb/s in the optical domain.
Volume 96 All articles Published: 20 August 2022 Article ID 0154 Research Article
All-optical half adder using carrier reservoir semiconductor optical amplifiers at 120 Gb/s
AMER KOTB KYRIAKOS E ZOIROS FAHAD ALHASHMI ALAMER WEI LI
In this paper, carrier reservoir semiconductor optical amplifiers (CR-SOAs) are employed for the first time to design an all-optical (AO) half adder at 120 Gb/s.
The CR-SOAs are incorporated in Mach–Zehnder interferometers (MZIs) configured as XOR and AND gates to execute the required SUM and CARRY logic functions,respectively.
The performance of the half adder is evaluated through the quality factor (
Volume 97, 2023
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