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 …

Near-field imaging techniques, at terahertz frequencies (1–10 THz), conventionally rely on
bulky laser sources and detectors. Here, we employ a semiconductor heterostructure laser …

To reduce the water footprint in agriculture, the recent push toward precision irrigation
management has initiated a sharp rise in photonics-based hydration sensing in plants in a …

In this article, we revisit the concept of optical feedback regimes in diode lasers and explore
each regime experimentally from a somewhat unconventional point of view by relating the …

The use of ultrasonic elastic waves is a well established technique for non-destructive
testing of materials and structures, in particular to exploit the interaction of waves with …

In this paper we report an improved method of coherent sensing through the use of a
generalized phase-stepping algorithm to extract magnitude and phase information from …

Correct detection of interferometric fringes is necessary to enable high-resolution metric
measurements using laser diode (LD)-based self-mixing (SM) interferometry. For noisy …

Terahertz (THz) imaging has long held promise for skin cancer detection but has been
hampered by the lack of practical technological implementation. In this article, we introduce …

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 …