Stable ultrashort light pulses and frequency combs generated by mode-locked lasers have
many important applications including high-resolution spectroscopy, fast chemical detection …

We propose a robust and reliable method of active mode locking of mid-infrared quantum
cascade lasers and develop its theoretical description. Its key element is the use of an …

Quantum cascade lasers (QCL) have revolutionized the generation of mid-infrared light. Yet,
the ultrafast carrier transport in mid-infrared QCLs has so far constituted a seemingly …

The recently discovered ability of the quantum cascade laser to produce a harmonic
frequency comb has attracted new interest in these devices for both applications and …

We present homogeneous quantum cascade lasers (QCLs) emitting around 3 THz which
display bandwidths up to 950 GHz with a single stable beatnote. Devices are spontaneously …

Recent research has shown that free-running quantum cascade lasers are capable of
producing frequency combs in midinfrared and THz regions of the spectrum. Unlike familiar …

The dynamics of a multimode quantum cascade laser, are studied in a model based on
effective semiconductor Maxwell-Bloch equations, encompassing key features for the …

Frequency comb formation in quantum cascade lasers is studied theoretically using a
Maxwell-Bloch formalism based on a modal decomposition, where dispersion is considered …

Quantum cascade lasers (QCLs) facilitate compact optical frequency comb sources that
operate in the mid-infrared and terahertz spectral regions, where many molecules have their …

The generation of mid-infrared pulses in monolithic and electrically pumped devices is of
great interest for mobile spectroscopic instruments. The gain dynamics of interband cascade …