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Investigation of Chaotic and Spiking Dynamics in Mid-Infrared Quantum Cascade Lasers Operating Continuous-Waves and Under Current Modulation

Abstract : This study investigates chaotic and spiking dynamics of mid-infrared quantum cascade lasers operating under external optical feedback and emitting at 5.5 µm and 9 µm. In order to deepen the understanding, the route to chaos is experimentally studied in the case of continuous-wave and current modulation operation. The non-linear dynamics are analyzed with bifurcation diagrams. While for quasi-continuous wave operation, chaos is found to be more complex, pure continuous wave pumping always leads to the generation of a regular spiking induced low-frequency fluctuations dynamics. In the latter, results show that by combining external optical feedback with periodic forcing and further induced current modulation allows a better control of the chaotic dropouts. This work provides a novel insight into the development of future secure free-space communications based on quantum cascade lasers or unpredictable optical countermeasure systems operating within the two transparency atmospheric windows hence between 3 µm-5 µm and 8.5 µm-11 µm.
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Contributor : Olivier Spitz Connect in order to contact the contributor
Submitted on : Sunday, September 27, 2020 - 8:53:00 PM
Last modification on : Wednesday, November 3, 2021 - 6:18:40 AM

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Olivier Spitz, Jiagui Wu, Andreas Herdt, Mathieu Carras, Wolfgang Elsässer, et al.. Investigation of Chaotic and Spiking Dynamics in Mid-Infrared Quantum Cascade Lasers Operating Continuous-Waves and Under Current Modulation. IEEE Journal of Selected Topics in Quantum Electronics, Institute of Electrical and Electronics Engineers, 2019, 25 (6), pp.1-11. ⟨10.1109/JSTQE.2019.2937445⟩. ⟨hal-02342830v2⟩

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