A laser frequency comb is a broad spectrum composed of equidistant narrow lines. Initially
invented for frequency metrology, such combs enable new approaches to spectroscopy over …

Frequency combs are optical spectra composed of a set of discrete equally spaced lines.
Such spectra can be generated by diverse sources such as mode-locked lasers, resonators …

Earth-like planets, dark energy and variability of fundamental physical constants can be
discovered by observing wavelength shifts in the optical spectra of astronomical objects …

We review the most recent progress in ultralow-noise mode-locked fiber lasers and fiber-
based frequency-comb sources. With the rapid progress in theory, measurement, and …

Orbiting planets induce a weak radial velocity (RV) shift in the host star that provides a
powerful method of planet detection. Importantly, the RV technique provides information …

Optical frequency combs (OFCs) are a unique kind of light source, which are represented as
a series of equally spaced coherent spectral lines in the frequency domain. OFCs can …

Measured spectral shifts due to intrinsic stellar variability (eg, pulsations, granulation) and
activity (eg, spots, plages) are the largest source of error for extreme-precision radial-velocity …

Ultrafast lasers have become powerful tools in various fields, and increasing their
fundamental repetition rates to the gigahertz (GHz) level holds great potential for frontier …

A new regime of precision radial-velocity measurements in the search for Earth-like
exoplanets is being facilitated by high-resolution spectrographs calibrated by laser …

Radial velocity (RV) perturbations induced by stellar surface inhomogeneities including
spots, plages and granules currently limit the detection of Earth-twins using Doppler …