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arXiv · 2311.13496

Quantum Cascade Lasers as Broadband Sources via Strong RF Modulation

Alessio Cargioli·Diego Piciocchi·Mathieu Bertrand·Richard Maulini·Tobias Gresch·Antonine Muller·Giacomo Scalari·Jerome Faist
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Abstract

In this work, we demonstrate that in a regime of strong modulation, by generating pulses of the length of the order of a few cavity lifetimes (hundreds of ps), a broadband quantum cascade laser can be driven to lase on a bandwidth (250cm-1) limited by the gain. In addition, the amplitude noise of the radiation was shown to be limited by the detector. A laser linewidth study has been performed under different operating conditions finding values spanning from 20MHz to 800MHz, indicating a trade-off between emission bandwidth, amplitude stability and coherence.

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Alessio Cargioli, Diego Piciocchi, Mathieu Bertrand, Richard Maulini, Tobias Gresch, Antonine Muller, Giacomo Scalari, Jerome Faist. 2023-11-22. Quantum Cascade Lasers as Broadband Sources via Strong RF Modulation. https://doi.org/10.1063/5.0188616

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