Slow-light switching in nonlinear Bragg-grating couplers.

Area of Science:

• Nonlinear optics
• Photonics
• Condensed matter physics

Background:

• Slow light propagation in nonlinear optical systems is crucial for advanced optical signal processing.
• Phase-shifted Bragg gratings offer unique dispersion properties for light manipulation.
• Nonlinear effects in optical couplers can lead to complex pulse dynamics.

Purpose of the Study:

• To investigate the propagation and switching dynamics of slow-light pulses in nonlinear couplers.
• To explore the use of nonlinear self-action for dispersion compensation and velocity tuning.
• To demonstrate control over pulse behavior using power-dependent nonlinearities.

Main Methods:

• Theoretical study of nonlinear pulse propagation.
• Analysis of light interaction within phase-shifted Bragg gratings.
• Numerical simulations of pulse dynamics in nonlinear optical couplers.

Main Results:

• Demonstrated compensation of dispersion-induced pulse broadening via gap soliton formation.
• Achieved power-controlled switching of slow-light pulses within the coupler.
• Showcased the ability to tune the propagation velocity of light pulses.

Conclusions:

• Nonlinear self-action provides a powerful mechanism for controlling slow-light pulses.
• Phase-shifted Bragg gratings in nonlinear couplers are promising for optical signal processing applications.
• The demonstrated techniques offer new avenues for manipulating light at the nanoscale.