High-Speed Combined Quantum-Dot Semiconductor Optical Amplifier and Ultrafast Nonlinear Interferometer-based All-Optical Logic Communications

P. Prasana — Tue, 20 May 2025 00:00:00 +0000

Interferometric devices have drawn great interest in all-optical signal processing for their high-speed photonic activity. All-optical logic and algebraic operations may now be performed using a QD-SOA-based gate using a quantum-dot semiconductor optical amplifier (QD-SOA). This is utilized in photonic processor for high-speed data transfer which relies on all optical logic gates. The nonlinear property of the SoA has recently been used to demonstrate high-speed all-optical logic gates. The QD SOA technology that has evolved in recent years has made a superior signal processing device available in the communication spectrum. Devices of this kind have been demonstrated experimentally to have a high saturation output power and low noise, fast carrier relaxation between QD energy levels, and a reduced impact on carrier heating gain and phase recovery. In this paper, a new technique for enhancing signal transmission quality using ultrafast nonlinear interferometer-based all-optical logical operations was proposed. For this purpose, a pair of QD-SOAs is incorporated into an interferometer. The optical logic XNOR gate-based model was demonstrated with the help of a pseudo-multilinear binary sequence (PMLBS) generator. The impact of the peak data power as well as of the QD-SOAs current density and QD-SOAs length on the ER and Q-factor of the switching outcome are explored and assessed using numerical simulation. The model’s findings on optical logic gates and PMLBS production imply that this system may generate data at speeds of up to 250 Gbps while maintaining high output efficiency.

Journal of Electronics and Telecommunication System Engineering

High-Speed Combined Quantum-Dot Semiconductor Optical Amplifier and Ultrafast Nonlinear Interferometer-based All-Optical Logic Communications