Modulation instability in amplitude modulated dispersion oscillating fibers

Area of Science:

• Nonlinear optics
• Fiber optics

Background:

• Modulation instability is a key process in nonlinear fiber optics.
• Dispersion oscillating fibers offer unique control over nonlinear phenomena.
• Amplitude modulation of group velocity dispersion is a novel approach to manipulate light propagation.

Purpose of the Study:

• To theoretically and experimentally investigate modulation instability in dispersion oscillating fibers with amplitude-modulated group velocity dispersion.
• To develop an analytical model for calculating parametric gain and predicting modulation instability sidelobes.
• To understand the effect of two fundamental frequencies on sidelobe splitting.

Main Methods:

• Development of an analytical model for parametric gain calculation.
• Theoretical prediction of quasi-phase matched modulation instability sidelobe positions.
• Experimental verification of theoretical predictions using dispersion oscillating fibers.

Main Results:

• The analytical model accurately predicts parametric gain in amplitude-modulated dispersion oscillating fibers.
• The presence of two fundamental frequencies in the dispersion profile causes splitting of modulation instability sidelobes.
• Experimental results confirm the theoretical predictions regarding sidelobe splitting.

Conclusions:

• Amplitude modulation of group velocity dispersion in oscillating fibers provides a method to control modulation instability.
• The splitting of modulation instability sidelobes is a direct consequence of the dual-frequency dispersion profile.
• This research advances the understanding and application of nonlinear phenomena in engineered optical fibers.