Résumé
Interband cascade lasers (ICL) are promising sources for particular applications in photonic integrated circuits. In particular, free-space optical communications and LIDAR systems are two practical fields where their use, and especially their controlled behavior when prone to external optical feedback is of great importance. In this work, we experimentally observed the transition from the short to the long delay regime on Fabry-Perot mid-infrared ICLs operating with external optical feedback. We observed, in the first case, the emission of a regular pulse package, which with increased delay progressively transitioned to low-frequency fluctuations. This work is to our knowledge the first experimental demonstration of regular pulse packages in the short feedback delay regime of ICL and paves the way to the development of mid-infrared LIDAR based on ICLs.(1)