Dual terahertz (THz) comb spectroscopy enables high spectral resolution, high spectral
accuracy, and broad spectral coverage; however, the requirement for dual stabilized …

In recent years, quantum cascade lasers (QCLs) have shown tremendous potential for the
generation of frequency combs in the mid-infrared and terahertz portions of the …

We report on a broad-band terahertz quantum-cascade laser (QCL) with a long Fabry-Pérot
ridge cavity, for which the tuning range of the individual laser modes exceeds the mode …

High-power and broadband dual-comb sources in the terahertz frequency regime are much
in demand for fast and high-resolution spectroscopies. The terahertz quantum cascade laser …

The generation and detection of a decade-spanning terahertz (THz) frequency comb is
reported using two Ti: sapphire femtosecond laser oscillators and asynchronous optical …

Terahertz light can be used to identify numerous complex molecules, but has traditionally
remained unexploited due to the lack of powerful broadband sources. Pulsed lasers can be …

Ring resonators are an interesting alternative cavity solution to the commonly used ridge-
type waveguide for terahertz (THz) quantum cascade lasers. They either support a standing …

THz quantum cascade lasers (QCLs) based on double metal waveguides feature
broadband and high-temperature devices for their use in spectroscopy and sensing …

Optical frequency combs are innovative tools for broadband spectroscopy because a series
of comb modes can serve as frequency markers that are traceable to a microwave frequency …

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 …