Enhancing time-delay suppression in a semiconductor laser with chaotic optical injection via parameter mismatch

Area of Science:

• Optics and Photonics
• Nonlinear Dynamics
• Laser Physics

Background:

• Time-delay signature (TDS) suppression is crucial for advancing chaos-based applications.
• External-cavity semiconductor lasers (ECSLs) are widely studied for their chaotic output.
• Regenerating time series via laser injection is a key technique for TDS manipulation.

Purpose of the Study:

• To investigate the influence of parameter mismatch on TDS evolution in a regenerated time series.
• To experimentally demonstrate and numerically validate the effect of parameter mismatch on TDS suppression.
• To explore the impact of injection parameters on achieving effective TDS suppression.

Main Methods:

• Experimental setup involving injection of chaotic output from an ECSL into another semiconductor laser.
• Systematic comparison of experimental results with numerical simulations.
• Analysis of TDS evolution under varying degrees of parameter mismatch and injection parameters.

Main Results:

• Experimental results show significantly easier TDS suppression when using mismatched laser pairs.
• Numerical simulations confirm the experimental findings, validating the role of parameter mismatch.
• Good agreement between experimental and simulation data regarding the influence of injection parameters on TDS suppression.

Conclusions:

• Parameter mismatch in laser pairs facilitates more effective time-delay signature suppression.
• The findings provide valuable insights for optimizing chaos-based laser systems.
• This work validates the use of mismatched lasers for enhanced performance in chaos engineering.