Frequency combs articles from across Nature Portfolio

We introduce an innovative quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy technique that utilizes a quartz tuning fork to achieve resonant detection of a dual comb based on the photoacoustic effect.

Kerr resonators can support a new form of parametrically driven temporal cavity soliton (and associated optical frequency comb), with potential performance advantages that include background-free operation and the possibility of very high pump-to-comb conversion efficiencies.

We demonstrate an all-optical, mode-locking, Kerr-comb frequency division method that provides a chip-scale microwave source that is extremely versatile, accurate, stable and has ultralow noise, using only a single continuous-wave laser.

A miniaturized optical frequency division system that could transfer the generation of microwaves, with superior spectral purity, to a complementary metal-oxide-semiconductor-compatible integrated photonic platform is demonstrated showing potential for large-volume, low-cost manufacturing for many applications.

We demonstrate a photon-counting approach that extends the unique advantages of spectroscopy with interfering frequency combs into regions where nonlinear frequency conversion tends to be very inefficient, providing a step towards precision broadband spectroscopy at short wavelengths and extreme-ultraviolet dual-comb spectroscopy.

An article in Nature Communications presents a spectral multiplication approach to obtain THz-tunable and broadband electro-optic combs using integrated multi-wavelength semiconductor lasers.

The three-dimensional images generated by digital holography are usually limited to a single color. A new technique exploiting frequency combs generates holograms with hundreds of colors at once.

Light propagating in the topological edge channel of an array of ring resonators is predicted to generate nested frequency combs: like a Matryoshka doll containing a set of smaller dolls, each ‘tooth’ of the comb comprises another frequency comb.

Drawing around 60 attendees and 20 presenters to a virtual lecture room, April’s CHI-2 Photonics in Microresonators and Beyond conference explored recent progress in the use of microresonators and integrated photonic devices exhibiting second-order nonlinearity for optical frequency conversion.

A chip-based optical frequency comb has enabled the realization of a 300 GHz signal with record low phase noise. The development could yield ultra-compact, ultra-low-noise sources for millimetre-wave applications in telecommunications, remote sensing and precision spectroscopy.