Over the past decade, the demonstration of frequency combs has been reported in a wide
range of quantum cascade lasers. These combs have huge potential in applications …

Optical frequency-comb sources, which emit perfectly periodic and coherent waveforms of
light, have recently rapidly progressed towards chip-scale integrated solutions. Among them …

Nonlinear photonics has unveiled new avenues for applications in metrology, spectroscopy,
and optical communications. Recently, there has been a surge of interest in integrated …

On-chip integration of optical comb sources is crucial in enabling their widespread use.
Integrated photonic devices that can be mass-manufactured in semiconductor processing …

Quantum cascade lasers (QCLs) constitute an intriguing opportunity for the generation of on-
chip optical dissipative Kerr solitons (DKSs). Originally demonstrated in passive …

Frequency‐modulated (FM) combs feature flat intensity spectra with a linear frequency chirp,
useful for metrology and sensing applications. Generating FM combs in semiconductor …

Ring quantum cascade lasers have recently gained considerable attention, showing
ultrastable frequency comb and soliton operation, thus opening a way to integrated …

We present a numerical study of the active harmonic mode locking (HML) of quantum
cascade lasers (QCLs) in the terahertz (THz) spectral range. This is a recently …

Quantum cascade lasers (QCLs) have emerged as promising candidates for generating chip-
scale frequency combs in mid-infrared and terahertz wavelengths. In this work, we …

Frequency-modulated (FM) combs with a linearly-chirped frequency and nearly constant
intensity occur naturally in certain laser systems; they can be most succinctly described by a …