Chaotic dimension enhancement by optical injection into a semiconductor laser under feedback

Area of Science:

• Nonlinear dynamics
• Laser physics
• Chaos theory

Background:

• Injecting optical signals into solitary lasers typically results in low-dimensional dynamics.
• Understanding and controlling the dimensionality of chaotic systems is crucial for various applications.

Purpose of the Study:

• To investigate optical injection into a chaotic laser under feedback for dimension enhancement.
• To explore the relationship between feedback, dimension enhancement, and time-delay signature suppression.

Main Methods:

• Experimental investigation of optical injection into a feedback-controlled chaotic laser.
• Utilizing a large dataset and high embedding dimension for accurate correlation dimension (D2) estimation.
• Employing averaging over short segments for computational efficiency.

Main Results:

• Optical injection into a chaotic laser with feedback significantly enhances the correlation dimension (D2).
• Dimension enhancement was achieved concurrently with the suppression of time-delay signatures.
• The study demonstrates a method for increasing the complexity of chaotic laser dynamics.

Conclusions:

• Feedback-controlled optical injection is an effective method for enhancing the correlation dimension of chaotic lasers.
• This technique offers a way to manage chaotic system complexity and potentially improve chaotic signal processing.
• The enhanced dimension (D2) is a valuable geometric characteristic for chaos-based applications.