The quantum cascade laser has evolved to be a compact, powerful source of coherent mid-
infrared light; however, its fast gain dynamics strongly restricts the formation of ultrashort …

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 …

In this work, control over the precise state emitted by quantum cascade laser frequency
combs through strong radio‐frequency current modulation close to their repetition frequency …

Chip-scale electrically pumped optical frequency combs (OFCs) are expected to play a
fundamental role in applications ranging from telecommunications to optical sensing. To …

SWIFT spectroscopy (Shifted Wave Interference Fourier Transform Spectroscopy) is a
coherent beatnote technique that can be used to measure the temporal profiles of periodic …

Frequency-modulated (FM) combs form spontaneously in free-running semiconductor lasers
and possess a vast potential for spectroscopic applications. Despite recent progress in …

Optical frequency combs are perfectly periodic waveforms of light, whose optical spectrum
consists of a large number of equidistant modes. The mode spacing lies in the radio …

The active mode-locking technique of quantum cascade lasers is highly affected by the bias
current level and the magnitude of the modulated signal because of the spatial hole burning …

We describe an elaborate model for calculation of optical gain in quantum cascade laser
(QCL) taking into account that such complex layered quantum-well based structure should …

Simulations predict perfect phasematching for difference frequency generation (DFG) in a
nonlinear ridge waveguide. It makes use of InGaAsP lattice-matched to InP as a nonlinear …