Quantum Cascade Lasers as Broadband Sources via Strong RF Modulation
Optics
2025-05-28 v1 Applied Physics
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.
Cite
@article{arxiv.2311.13496,
title = {Quantum Cascade Lasers as Broadband Sources via Strong RF Modulation},
author = {Alessio Cargioli and Diego Piciocchi and Mathieu Bertrand and Richard Maulini and Tobias Gresch and Antonine Muller and Giacomo Scalari and Jerome Faist},
journal= {arXiv preprint arXiv:2311.13496},
year = {2025}
}