Optical frequency comb synthesizers have represented a revolutionary approach to
frequency metrology, providing a grid of frequency references for any laser emitting within …

Optical frequency combs (OFCs), which establish a rigid phase-coherent link between the
microwave and optical domains of the electromagnetic spectrum, are emerging as key high …

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 …

Broadband metrological‐grade frequency comb (FC) synthesizers with a rich number of
phase locked modes are the ideal sources for quantum sensing and quantum metrology. At …

High-resolution spectroscopy not only can identify atoms and molecules but also can
provide detailed information on their chemical and physical environment and relative …

We report on a heterogeneous active region design for terahertz quantum cascade laser
based frequency combs. Dynamic range, spectral bandwidth and output power have been …

The terahertz region is of great importance for spectroscopy since many molecules have
absorption fingerprints there. Frequency combs based on terahertz quantum cascade lasers …

Optical frequency combs, establish a rigid phase-coherent link between microwave and
optical domains and are emerging as high-precision tools in an increasing number of …

Terahertz quantum cascade laser sources based on intra-cavity difference frequency
generation from mid-IR devices are an important asset for applications in rotational …

Miniaturized frequency combs (FCs) can be self-generated at terahertz (THz) frequencies
through four-wave mixing in the cavity of a quantum cascade laser (QCL). To date, however …