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Journal articles
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.
Cited literature [42 references]
https://hal.telecom-paris.fr/hal-02342830
Contributor : Olivier Spitz Connect in order to contact the contributor
Submitted on : Sunday, September 27, 2020 - 8:53:00 PM
Last modification on : Tuesday, October 19, 2021 - 11:15:02 AM
Contributor : Olivier Spitz Connect in order to contact the contributor
Submitted on : Sunday, September 27, 2020 - 8:53:00 PM
Last modification on : Tuesday, October 19, 2021 - 11:15:02 AM
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