Mid-infrared quantum cascade lasers are semiconductor injection lasers whose active core
implements a multiple-quantum-well structure. Relying on a designed staircase of …

Germanium oxide (GeO2) and tellurium oxide (TeO2) based glasses are classed as the
heavy metal oxide glasses, with phonon energies ranging between 740cm− 1 and 880cm …

Quantum cascade lasers (QCL) are the first room temperature semiconductor laser source
for the mid-IR spectral region, triggering substantial development for the advancement of …

In the short space of 15years since their first demonstration, quantum cascade lasers have
become the most useful sources of tunable mid-infrared laser radiation. This Letter …

Mid-infrared light sources are essential for applications that include free-space
communication, chemical and biomolecular sensing and infrared spectroscopy,,, but no …

Changing the length of a laser cavity is a simple technique for continuously tuning the
wavelength of a laser but is rarely used for broad fractional tuning, with a notable exception …

In this paper we review the progress of the development of mid-infrared quantum cascade
lasers (QCLs) operated in an external cavity configuration. We concentrate on QCLs based …

The design and operating principles of quantum cascade lasers (QCLs) are reviewed along
with recent developments in high-power cw and broadband devices. Cw power levels of …

Mid-infrared (MIR) imaging has emerged as a valuable tool to investigate biological
samples, such as tissue histological sections and cell cultures, by providing non-destructive …

A transportable prototype Faraday rotation spectroscopic system based on a tunable
external cavity quantum cascade laser has been developed for ultrasensitive detection of …