Modeling of soliton-dragging logic gates with gain

Area of Science:

• Photonics
• Optical Engineering
• Nonlinear Optics

Background:

• Soliton dragging logic gates are crucial for optical switching.
• Existing designs face strict timing constraints, limiting their practical application.
• Previous research proposed adding lumped gain to relax these constraints.

Purpose of the Study:

• To investigate the effect of discrete lumped gain on soliton dragging logic gates.
• To compare the accuracy of reduced models with complete simulations for analyzing these gates.
• To evaluate the performance enhancement in terms of timing window and pulse shift prediction.

Main Methods:

• Development and application of three reduced models for analyzing the soliton dragging gate with discrete gain.
• Comparison of reduced models against complete numerical simulations.
• Utilizing the variational method with chirp for precise prediction of control pulse time shift.

Main Results:

• The variational method with chirp demonstrated high accuracy (within 12%) in predicting control pulse time shifts.
• This method accurately predicted a twofold increase in the timing window for the soliton dragging gate.
• Results from the variational method align with comprehensive simulations and experimental findings.

Conclusions:

• Adding lumped gain effectively relaxes timing constraints in soliton dragging logic gates.
• The variational method with chirp is a reliable and accurate reduced model for analyzing such systems.
• The findings support the enhancement of optical switching devices through gain incorporation.