Seminarium Optyczne

The research explores pulse energy-controlled solitonic steering of femtosecond pulses in highly nonlinear dual-core fibers, offering insights into ultrafast nonlinear fiber optics and soliton theory in coupled waveguides. Specially designed dual-core fibers facilitate energy-driven switching of femtosecond pulses, leveraging the nonlinear self-trapping of high-order solitons induced by the Kerr effect. Numerical optimization of fiber structure and experimental validation demonstrate optimal switching parameters, spectral uniformity, and the impact of dual-core asymmetry. Notably, two innovative schemes are presented: 1) Self-switching: Demonstrating reversible switching with sub-nJ pulses, exhibiting soliton-like behavior, and showcasing broadband performance. 2) Dual wavelength approach: Introducing a method based on the interaction between synchronized femtosecond pulses at different wavelengths, enabling efficient switching with high contrasts and minimal wavelength shifts.. The study underscores the potential for practical applications in compact, low-power, all-optical switching devices for optical communications.