AI Article Synopsis
- A new method is introduced to generate chaotic output from a semiconductor laser without the time-delay signature (TDS) by using a self-feedback antisymmetric coupling fiber ring resonator (SACFRR).
- A theoretical model demonstrates how multi-path feedback works in this setup, incorporating the response of the SACFRR into the Lang-Kobayashi model.
- Experimental results show that using the SACFRR effectively eliminates the TDS, and the optimal coupling coefficient for best performance is found to be 0.3, making this approach suitable for applications in secure communications and random bit generation.
Article Abstract
A scheme for generating a chaotic output from a semiconductor laser while eliminating the time-delay signature (TDS) is proposed, leveraging the multi-path feedback provided by a self-feedback antisymmetric coupling fiber ring resonator (SACFRR). A theoretical model is developed to elucidate the feedback perturbation process in the proposed structure. The multi-path feedback can be modeled by incorporating the unit impulse response of the SACFRR into the modified Lang-Kobayashi-based model. We successfully eliminated the TDS using the SACFRR structure in our experimental demonstration. Further investigation into the impact of the coupling coefficient on the TDS revealed that the optimal value is 0.3, which results in the largest mapping area with the TDS below 0.03. The proposed structure is highly effective and simple to implement and integrate. As a result, the chaotic laser generated by this structure can serve as an efficient optical source for encrypted communications, chaotic Lidar, and random bit generation.
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| http://dx.doi.org/10.1364/OL.533804 | DOI Listing |
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