1.
Phys Rev Lett
; 132(4): 043805, 2024 Jan 26.
Artículo
en Inglés
| MEDLINE
| ID: mdl-38335338
RESUMEN
Ring quantum cascade lasers have recently gained considerable attention, showing ultrastable frequency comb and soliton operation, thus opening a way to integrated spectrometers in the midinfrared and terahertz fingerprint regions. Thanks to a self-consistent Maxwell-Bloch model, we demonstrate, in excellent agreement with the experimental data, that a small but finite coupling between the counterpropagating waves arising from distributed backscattering is essential to stabilize the soliton solution.