Quantum cascade lasers (QCLs) are high-power sources of coherent radiation in the
midinfrared and terahertz (THz) bands. Laser feedback interferometry (LFI) is one of the …

Optical feedback exists in most laser configurations and strongly affects laser performances
depending on the feedback strength, length, and phase. In this paper, we investigate the …

We provide an experimental evidence of transient instabilities (TIs) in a terahertz (THz)
quantum cascade laser (QCL) under optical feedback, in contrast to the widely accepted …

We report a coherent terahertz (THz) imaging system that utilises a quantum cascade laser
(QCL) operating in pulsed-mode as both the source and detector. The realisation of a short …

The phenomenon of self-pulsation (SP) in terahertz (THz) quantum cascade lasers (QCLs)
due to optical feedback was reported recently. In this Letter, we propose a THz imaging …

The typical modal characteristics arising during laser feedback interferometry (LFI) in multi-
mode terahertz (THz) quantum cascade lasers (QCLs) are investigated in this work. To this …

We report on the high detection sensitivity of a laser feedback interferometry scheme based
on a terahertz frequency quantum cascade laser (QCL). We show that variations on the laser …

In this article, we explore the interplay between the self-pulsations (SPs) and self-mixing
(SM) signals generated in terahertz (THz) quantum cascade lasers (QCLs) under optical …

Terahertz quantum cascade-lasers (QCLs) are able to produce higher optical output power
at higher temperatures when operated in pulsed mode. Predicting a laser's behavior under …

We propose a laser feedback interferometer operating at multiple terahertz (THz) frequency
bands by using a pulsed coupled-cavity THz quantum cascade laser (QCL) under optical …