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Coherent Frequency Combs produced by Self Frequency Modulation in Quantum Cascade Lasers

One salient characteristic of Quantum Cascade Laser (QCL) is its very shor gain recovery time that so far thwarted the attempts to achieve self-mode locking of the device into a train of single pulses. We show theoretically that four wave mixing, combined with the short gain recovery time causes QCL to operate in the self-frequency-modulated regime characterized by a constant power in time domain and stable coherent comb in the frequency domain.Coherent frequency comb may enable many potential applications of QCL in sensing and measurement.

preprint2013arXivOpen access
Jacob KhurginYamac DikmelikAndreas HugiJerome Faist
physics.optics
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Open access4 authors1 topic
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Jacob KhurginYamac DikmelikAndreas HugiJerome Faist

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