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High frequency dynamics in quantum cascade lasers : a roadmap to free-space communications in the mid-infrared

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Academic year: 2021

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Fig. 1 (a) optical spectra retrieved with a Fourier transform infrared spectrometer (Bruker Vertex 80V) of the free-running master QCL (in orange)  operating at 250 K and 650 mA and of the free-running slave QCL (in cyan) operating at 278K and 450 mA; (b)
Fig. 3 : (a) experimental time traces of the output of the slave QCL when the pump current of the master QCL is at 485.8 mA (blue) showing  chaos and at 485.5 mA (red) showing only noise

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