Watt-level widely tunable single-mode emission by injection-locking of a multimode Fabry-Perot quantum cascade laser

@article{Chevalier2017WattlevelWT,
  title={Watt-level widely tunable single-mode emission by injection-locking of a multimode Fabry-Perot quantum cascade laser},
  author={Paul Chevalier and Marco Piccardo and Sajant Anand and Enrique A. Mejia and Yongrui Wang and Tobias S. Mansuripur and Feng Xie and Kevin Lascola and Alexey Belyanin and Federico Capasso},
  journal={arXiv: Optics},
  year={2017}
}
Free-running Fabry-Perot lasers normally operate in a single-mode regime until the pumping current is increased beyond the single-mode instability threshold, above which they evolve into a multimode state. As a result of this instability, the single-mode operation of these lasers is typically constrained to few percents of their output power range, this being an undesired limitation in spectroscopy applications. In order to expand the span of single-mode operation, we use an optical injection… 
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