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Wideband chaos generation using VCSELs with intensity-modulated chaotic optical injection
Optics Express
|August 13, 2025
Summary
This study introduces a new method for wideband chaos generation using intensity-modulated optical injection from a vertical-cavity surface-emitting laser. The technique significantly boosts chaos bandwidth, achieving up to 47.9 GHz.
Area of Science:
- Photonics and Optical Engineering
- Nonlinear Dynamics
- Laser Physics
Background:
- Vertical-cavity surface-emitting lasers (VCSELs) are key components in optical systems.
- Chaotic optical injection is a method to generate complex optical signals.
- Understanding chaos bandwidth is crucial for applications in secure communications and signal processing.
Purpose of the Study:
- To propose a novel approach for wideband chaos generation using intensity-modulated chaotic optical injection.
- To investigate the impact of injection configurations (parallel and orthogonal) on chaos bandwidth.
- To analyze the influence of injection parameters like strength and frequency detuning.
Main Methods:
- Utilizing chaotic signals from a free-running vertical-cavity surface-emitting laser (VCSEL).
- Implementing two injection configurations: parallel and orthogonal.
- Performing numerical simulations to study the effects of intensity modulation and injection parameters.
Main Results:
- Intensity modulation was found to disrupt the injection-locking state in unidirectional injection.
- Additional frequency components were introduced, leading to increased chaos bandwidth.
- Chaos bandwidths exceeding double that of free-running chaos were observed, reaching a maximum of 47.9 GHz.
Conclusions:
- Intensity-modulated chaotic optical injection is an effective method for generating wideband chaos.
- This technique offers significant enhancements in chaos bandwidth compared to traditional methods.
- The findings have implications for advanced optical signal generation and processing.
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